21984040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{631}}^1$

素因数の和:722

約数の個数: 64

約数和(自身を含む): 54149760

約数和(自身を除く): 32165720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 67, 104, 130, 134, 260, 268, 335, 520, 536, 631, 670, 871, 1262, 1340, 1742, 2524, 2680, 3155, 3484, 4355, 5048, 6310, 6968, 8203, 8710, 12620, 16406, 17420, 25240, 32812, 34840, 41015, 42277, 65624, 82030, 84554, 164060, 169108, 211385, 328120, 338216, 422770, 549601, 845540, 1099202, 1691080, 2198404, 2748005, 4396808, 5496010, 10992020, 21984040]

約数ペア:

[(1, 21984040), (2, 10992020), (4, 5496010), (5, 4396808), (8, 2748005), (10, 2198404), (13, 1691080), (20, 1099202), (26, 845540), (40, 549601), (52, 422770), (65, 338216), (67, 328120), (104, 211385), (130, 169108), (134, 164060), (260, 84554), (268, 82030), (335, 65624), (520, 42277), (536, 41015), (631, 34840), (670, 32812), (871, 25240), (1262, 17420), (1340, 16406), (1742, 12620), (2524, 8710), (2680, 8203), (3155, 6968), (3484, 6310), (4355, 5048)]