19856980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:217

約数の個数: 96

約数和(自身を含む): 50295168

約数和(自身を除く): 30438188

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 53, 55, 65, 106, 110, 130, 131, 143, 212, 220, 260, 262, 265, 286, 524, 530, 572, 583, 655, 689, 715, 1060, 1166, 1310, 1378, 1430, 1441, 1703, 2332, 2620, 2756, 2860, 2882, 2915, 3406, 3445, 5764, 5830, 6812, 6890, 6943, 7205, 7579, 8515, 11660, 13780, 13886, 14410, 15158, 17030, 18733, 27772, 28820, 30316, 34060, 34715, 37466, 37895, 69430, 74932, 75790, 76373, 90259, 93665, 138860, 151580, 152746, 180518, 187330, 305492, 361036, 374660, 381865, 451295, 763730, 902590, 992849, 1527460, 1805180, 1985698, 3971396, 4964245, 9928490, 19856980]

約数ペア:

[(1, 19856980), (2, 9928490), (4, 4964245), (5, 3971396), (10, 1985698), (11, 1805180), (13, 1527460), (20, 992849), (22, 902590), (26, 763730), (44, 451295), (52, 381865), (53, 374660), (55, 361036), (65, 305492), (106, 187330), (110, 180518), (130, 152746), (131, 151580), (143, 138860), (212, 93665), (220, 90259), (260, 76373), (262, 75790), (265, 74932), (286, 69430), (524, 37895), (530, 37466), (572, 34715), (583, 34060), (655, 30316), (689, 28820), (715, 27772), (1060, 18733), (1166, 17030), (1310, 15158), (1378, 14410), (1430, 13886), (1441, 13780), (1703, 11660), (2332, 8515), (2620, 7579), (2756, 7205), (2860, 6943), (2882, 6890), (2915, 6812), (3406, 5830), (3445, 5764)]