21501040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{461}}^1$

素因数の和:538

約数の個数: 80

約数和(自身を含む): 55683936

約数和(自身を除く): 34182896

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 53, 55, 80, 88, 106, 110, 176, 212, 220, 265, 424, 440, 461, 530, 583, 848, 880, 922, 1060, 1166, 1844, 2120, 2305, 2332, 2915, 3688, 4240, 4610, 4664, 5071, 5830, 7376, 9220, 9328, 10142, 11660, 18440, 20284, 23320, 24433, 25355, 36880, 40568, 46640, 48866, 50710, 81136, 97732, 101420, 122165, 195464, 202840, 244330, 268763, 390928, 405680, 488660, 537526, 977320, 1075052, 1343815, 1954640, 2150104, 2687630, 4300208, 5375260, 10750520, 21501040]

約数ペア:

[(1, 21501040), (2, 10750520), (4, 5375260), (5, 4300208), (8, 2687630), (10, 2150104), (11, 1954640), (16, 1343815), (20, 1075052), (22, 977320), (40, 537526), (44, 488660), (53, 405680), (55, 390928), (80, 268763), (88, 244330), (106, 202840), (110, 195464), (176, 122165), (212, 101420), (220, 97732), (265, 81136), (424, 50710), (440, 48866), (461, 46640), (530, 40568), (583, 36880), (848, 25355), (880, 24433), (922, 23320), (1060, 20284), (1166, 18440), (1844, 11660), (2120, 10142), (2305, 9328), (2332, 9220), (2915, 7376), (3688, 5830), (4240, 5071), (4610, 4664)]