19781680

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{163}}^1$

素因数の和:254

約数の個数: 80

約数和(自身を含む): 48684384

約数和(自身を除く): 28902704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 41, 74, 80, 82, 148, 163, 164, 185, 205, 296, 326, 328, 370, 410, 592, 652, 656, 740, 815, 820, 1304, 1480, 1517, 1630, 1640, 2608, 2960, 3034, 3260, 3280, 6031, 6068, 6520, 6683, 7585, 12062, 12136, 13040, 13366, 15170, 24124, 24272, 26732, 30155, 30340, 33415, 48248, 53464, 60310, 60680, 66830, 96496, 106928, 120620, 121360, 133660, 241240, 247271, 267320, 482480, 494542, 534640, 989084, 1236355, 1978168, 2472710, 3956336, 4945420, 9890840, 19781680]

約数ペア:

[(1, 19781680), (2, 9890840), (4, 4945420), (5, 3956336), (8, 2472710), (10, 1978168), (16, 1236355), (20, 989084), (37, 534640), (40, 494542), (41, 482480), (74, 267320), (80, 247271), (82, 241240), (148, 133660), (163, 121360), (164, 120620), (185, 106928), (205, 96496), (296, 66830), (326, 60680), (328, 60310), (370, 53464), (410, 48248), (592, 33415), (652, 30340), (656, 30155), (740, 26732), (815, 24272), (820, 24124), (1304, 15170), (1480, 13366), (1517, 13040), (1630, 12136), (1640, 12062), (2608, 7585), (2960, 6683), (3034, 6520), (3260, 6068), (3280, 6031)]