21533220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{227}}^1$

素因数の和:290

約数の個数: 144

約数和(自身を含む): 71705088

約数和(自身を除く): 50171868

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 31, 34, 36, 45, 51, 60, 62, 68, 85, 90, 93, 102, 124, 153, 155, 170, 180, 186, 204, 227, 255, 279, 306, 310, 340, 372, 454, 465, 510, 527, 558, 612, 620, 681, 765, 908, 930, 1020, 1054, 1116, 1135, 1362, 1395, 1530, 1581, 1860, 2043, 2108, 2270, 2635, 2724, 2790, 3060, 3162, 3405, 3859, 4086, 4540, 4743, 5270, 5580, 6324, 6810, 7037, 7718, 7905, 8172, 9486, 10215, 10540, 11577, 13620, 14074, 15436, 15810, 18972, 19295, 20430, 21111, 23154, 23715, 28148, 31620, 34731, 35185, 38590, 40860, 42222, 46308, 47430, 57885, 63333, 69462, 70370, 77180, 84444, 94860, 105555, 115770, 119629, 126666, 138924, 140740, 173655, 211110, 231540, 239258, 253332, 316665, 347310, 358887, 422220, 478516, 598145, 633330, 694620, 717774, 1076661, 1196290, 1266660, 1435548, 1794435, 2153322, 2392580, 3588870, 4306644, 5383305, 7177740, 10766610, 21533220]

約数ペア:

[(1, 21533220), (2, 10766610), (3, 7177740), (4, 5383305), (5, 4306644), (6, 3588870), (9, 2392580), (10, 2153322), (12, 1794435), (15, 1435548), (17, 1266660), (18, 1196290), (20, 1076661), (30, 717774), (31, 694620), (34, 633330), (36, 598145), (45, 478516), (51, 422220), (60, 358887), (62, 347310), (68, 316665), (85, 253332), (90, 239258), (93, 231540), (102, 211110), (124, 173655), (153, 140740), (155, 138924), (170, 126666), (180, 119629), (186, 115770), (204, 105555), (227, 94860), (255, 84444), (279, 77180), (306, 70370), (310, 69462), (340, 63333), (372, 57885), (454, 47430), (465, 46308), (510, 42222), (527, 40860), (558, 38590), (612, 35185), (620, 34731), (681, 31620), (765, 28148), (908, 23715), (930, 23154), (1020, 21111), (1054, 20430), (1116, 19295), (1135, 18972), (1362, 15810), (1395, 15436), (1530, 14074), (1581, 13620), (1860, 11577), (2043, 10540), (2108, 10215), (2270, 9486), (2635, 8172), (2724, 7905), (2790, 7718), (3060, 7037), (3162, 6810), (3405, 6324), (3859, 5580), (4086, 5270), (4540, 4743)]