20820640

素因数分解:

$2^5\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3517}}^1$

素因数の和:3569

約数の個数: 48

約数和(自身を含む): 50532552

約数和(自身を除く): 29711912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 74, 80, 148, 160, 185, 296, 370, 592, 740, 1184, 1480, 2960, 3517, 5920, 7034, 14068, 17585, 28136, 35170, 56272, 70340, 112544, 130129, 140680, 260258, 281360, 520516, 562720, 650645, 1041032, 1301290, 2082064, 2602580, 4164128, 5205160, 10410320, 20820640]

約数ペア:

[(1, 20820640), (2, 10410320), (4, 5205160), (5, 4164128), (8, 2602580), (10, 2082064), (16, 1301290), (20, 1041032), (32, 650645), (37, 562720), (40, 520516), (74, 281360), (80, 260258), (148, 140680), (160, 130129), (185, 112544), (296, 70340), (370, 56272), (592, 35170), (740, 28136), (1184, 17585), (1480, 14068), (2960, 7034), (3517, 5920)]