1279681720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1\times {\mathrm{2377}}^1$

素因数の和:2744

約数の個数: 64

約数和(自身を含む): 2956900320

約数和(自身を除く): 1677218600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 313, 344, 430, 626, 860, 1252, 1565, 1720, 2377, 2504, 3130, 4754, 6260, 9508, 11885, 12520, 13459, 19016, 23770, 26918, 47540, 53836, 67295, 95080, 102211, 107672, 134590, 204422, 269180, 408844, 511055, 538360, 744001, 817688, 1022110, 1488002, 2044220, 2976004, 3720005, 4088440, 5952008, 7440010, 14880020, 29760040, 31992043, 63984086, 127968172, 159960215, 255936344, 319920430, 639840860, 1279681720]

約数ペア:

[(1, 1279681720), (2, 639840860), (4, 319920430), (5, 255936344), (8, 159960215), (10, 127968172), (20, 63984086), (40, 31992043), (43, 29760040), (86, 14880020), (172, 7440010), (215, 5952008), (313, 4088440), (344, 3720005), (430, 2976004), (626, 2044220), (860, 1488002), (1252, 1022110), (1565, 817688), (1720, 744001), (2377, 538360), (2504, 511055), (3130, 408844), (4754, 269180), (6260, 204422), (9508, 134590), (11885, 107672), (12520, 102211), (13459, 95080), (19016, 67295), (23770, 53836), (26918, 47540)]