21486990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{311}}^1$

素因数の和:382

約数の個数: 96

約数和(自身を含む): 61461504

約数和(自身を除く): 39974514

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 47, 49, 70, 94, 98, 105, 141, 147, 210, 235, 245, 282, 294, 311, 329, 470, 490, 622, 658, 705, 735, 933, 987, 1410, 1470, 1555, 1645, 1866, 1974, 2177, 2303, 3110, 3290, 4354, 4606, 4665, 4935, 6531, 6909, 9330, 9870, 10885, 11515, 13062, 13818, 14617, 15239, 21770, 23030, 29234, 30478, 32655, 34545, 43851, 45717, 65310, 69090, 73085, 76195, 87702, 91434, 102319, 146170, 152390, 204638, 219255, 228585, 306957, 438510, 457170, 511595, 613914, 716233, 1023190, 1432466, 1534785, 2148699, 3069570, 3581165, 4297398, 7162330, 10743495, 21486990]

約数ペア:

[(1, 21486990), (2, 10743495), (3, 7162330), (5, 4297398), (6, 3581165), (7, 3069570), (10, 2148699), (14, 1534785), (15, 1432466), (21, 1023190), (30, 716233), (35, 613914), (42, 511595), (47, 457170), (49, 438510), (70, 306957), (94, 228585), (98, 219255), (105, 204638), (141, 152390), (147, 146170), (210, 102319), (235, 91434), (245, 87702), (282, 76195), (294, 73085), (311, 69090), (329, 65310), (470, 45717), (490, 43851), (622, 34545), (658, 32655), (705, 30478), (735, 29234), (933, 23030), (987, 21770), (1410, 15239), (1470, 14617), (1555, 13818), (1645, 13062), (1866, 11515), (1974, 10885), (2177, 9870), (2303, 9330), (3110, 6909), (3290, 6531), (4354, 4935), (4606, 4665)]