21270147340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{1453}}^1$

素因数の和:1620

約数の個数: 144

約数和(自身を含む): 49887182016

約数和(自身を除く): 28617034676

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 71, 122, 130, 142, 169, 244, 260, 284, 305, 338, 355, 610, 676, 710, 793, 845, 923, 1220, 1420, 1453, 1586, 1690, 1846, 2906, 3172, 3380, 3692, 3965, 4331, 4615, 5812, 7265, 7930, 8662, 9230, 10309, 11999, 14530, 15860, 17324, 18460, 18889, 20618, 21655, 23998, 29060, 37778, 41236, 43310, 47996, 51545, 56303, 59995, 75556, 86620, 88633, 94445, 103090, 103163, 112606, 119990, 177266, 188890, 206180, 206326, 225212, 239980, 245557, 281515, 354532, 377780, 412652, 443165, 491114, 515815, 563030, 731939, 886330, 982228, 1031630, 1126060, 1152229, 1227785, 1341119, 1463878, 1772660, 2063260, 2304458, 2455570, 2682238, 2927756, 3659695, 4608916, 4911140, 5364476, 5761145, 6292943, 6705595, 7319390, 11522290, 12585886, 13411190, 14638780, 14978977, 17434547, 23044580, 25171772, 26822380, 29957954, 31464715, 34869094, 59915908, 62929430, 69738188, 74894885, 81808259, 87172735, 125858860, 149789770, 163616518, 174345470, 299579540, 327233036, 348690940, 409041295, 818082590, 1063507367, 1636165180, 2127014734, 4254029468, 5317536835, 10635073670, 21270147340]

約数ペア:

[(1, 21270147340), (2, 10635073670), (4, 5317536835), (5, 4254029468), (10, 2127014734), (13, 1636165180), (20, 1063507367), (26, 818082590), (52, 409041295), (61, 348690940), (65, 327233036), (71, 299579540), (122, 174345470), (130, 163616518), (142, 149789770), (169, 125858860), (244, 87172735), (260, 81808259), (284, 74894885), (305, 69738188), (338, 62929430), (355, 59915908), (610, 34869094), (676, 31464715), (710, 29957954), (793, 26822380), (845, 25171772), (923, 23044580), (1220, 17434547), (1420, 14978977), (1453, 14638780), (1586, 13411190), (1690, 12585886), (1846, 11522290), (2906, 7319390), (3172, 6705595), (3380, 6292943), (3692, 5761145), (3965, 5364476), (4331, 4911140), (4615, 4608916), (5812, 3659695), (7265, 2927756), (7930, 2682238), (8662, 2455570), (9230, 2304458), (10309, 2063260), (11999, 1772660), (14530, 1463878), (15860, 1341119), (17324, 1227785), (18460, 1152229), (18889, 1126060), (20618, 1031630), (21655, 982228), (23998, 886330), (29060, 731939), (37778, 563030), (41236, 515815), (43310, 491114), (47996, 443165), (51545, 412652), (56303, 377780), (59995, 354532), (75556, 281515), (86620, 245557), (88633, 239980), (94445, 225212), (103090, 206326), (103163, 206180), (112606, 188890), (119990, 177266)]