21298420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{677}}^1$

素因数の和:721

約数の個数: 72

約数和(自身を含む): 53022312

約数和(自身を除く): 31723892

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, 677, 715, 1210, 1354, 1430, 1573, 2420, 2708, 2860, 3146, 3385, 6292, 6770, 7447, 7865, 8801, 13540, 14894, 15730, 17602, 29788, 31460, 35204, 37235, 44005, 74470, 81917, 88010, 96811, 148940, 163834, 176020, 193622, 327668, 387244, 409585, 484055, 819170, 968110, 1064921, 1638340, 1936220, 2129842, 4259684, 5324605, 10649210, 21298420]

約数ペア:

[(1, 21298420), (2, 10649210), (4, 5324605), (5, 4259684), (10, 2129842), (11, 1936220), (13, 1638340), (20, 1064921), (22, 968110), (26, 819170), (44, 484055), (52, 409585), (55, 387244), (65, 327668), (110, 193622), (121, 176020), (130, 163834), (143, 148940), (220, 96811), (242, 88010), (260, 81917), (286, 74470), (484, 44005), (572, 37235), (605, 35204), (677, 31460), (715, 29788), (1210, 17602), (1354, 15730), (1430, 14894), (1573, 13540), (2420, 8801), (2708, 7865), (2860, 7447), (3146, 6770), (3385, 6292)]