21445490

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{331}}^1$

素因数の和:399

約数の個数: 64

約数和(自身を含む): 45895680

約数和(自身を除く): 24450190

約数列:

[1, 2, 5, 10, 11, 19, 22, 31, 38, 55, 62, 95, 110, 155, 190, 209, 310, 331, 341, 418, 589, 662, 682, 1045, 1178, 1655, 1705, 2090, 2945, 3310, 3410, 3641, 5890, 6289, 6479, 7282, 10261, 12578, 12958, 18205, 20522, 31445, 32395, 36410, 51305, 62890, 64790, 69179, 102610, 112871, 138358, 194959, 225742, 345895, 389918, 564355, 691790, 974795, 1128710, 1949590, 2144549, 4289098, 10722745, 21445490]

約数ペア:

[(1, 21445490), (2, 10722745), (5, 4289098), (10, 2144549), (11, 1949590), (19, 1128710), (22, 974795), (31, 691790), (38, 564355), (55, 389918), (62, 345895), (95, 225742), (110, 194959), (155, 138358), (190, 112871), (209, 102610), (310, 69179), (331, 64790), (341, 62890), (418, 51305), (589, 36410), (662, 32395), (682, 31445), (1045, 20522), (1178, 18205), (1655, 12958), (1705, 12578), (2090, 10261), (2945, 7282), (3310, 6479), (3410, 6289), (3641, 5890)]