643136780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{20443}}^1$

素因数の和:20487

約数の個数: 72

約数和(自身を含む): 1598802576

約数和(自身を除く): 955665796

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 121, 130, 143, 220, 242, 260, 286, 484, 572, 605, 715, 1210, 1430, 1573, 2420, 2860, 3146, 6292, 7865, 15730, 20443, 31460, 40886, 81772, 102215, 204430, 224873, 265759, 408860, 449746, 531518, 899492, 1063036, 1124365, 1328795, 2248730, 2473603, 2657590, 2923349, 4497460, 4947206, 5315180, 5846698, 9894412, 11693396, 12368015, 14616745, 24736030, 29233490, 32156839, 49472060, 58466980, 64313678, 128627356, 160784195, 321568390, 643136780]

約数ペア:

[(1, 643136780), (2, 321568390), (4, 160784195), (5, 128627356), (10, 64313678), (11, 58466980), (13, 49472060), (20, 32156839), (22, 29233490), (26, 24736030), (44, 14616745), (52, 12368015), (55, 11693396), (65, 9894412), (110, 5846698), (121, 5315180), (130, 4947206), (143, 4497460), (220, 2923349), (242, 2657590), (260, 2473603), (286, 2248730), (484, 1328795), (572, 1124365), (605, 1063036), (715, 899492), (1210, 531518), (1430, 449746), (1573, 408860), (2420, 265759), (2860, 224873), (3146, 204430), (6292, 102215), (7865, 81772), (15730, 40886), (20443, 31460)]