81394840

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{1601}}^1$

素因数の和:1684

約数の個数: 64

約数和(自身を含む): 193777920

約数和(自身を除く): 112383080

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 41, 62, 82, 124, 155, 164, 205, 248, 310, 328, 410, 620, 820, 1240, 1271, 1601, 1640, 2542, 3202, 5084, 6355, 6404, 8005, 10168, 12710, 12808, 16010, 25420, 32020, 49631, 50840, 64040, 65641, 99262, 131282, 198524, 248155, 262564, 328205, 397048, 496310, 525128, 656410, 992620, 1312820, 1985240, 2034871, 2625640, 4069742, 8139484, 10174355, 16278968, 20348710, 40697420, 81394840]

約数ペア:

[(1, 81394840), (2, 40697420), (4, 20348710), (5, 16278968), (8, 10174355), (10, 8139484), (20, 4069742), (31, 2625640), (40, 2034871), (41, 1985240), (62, 1312820), (82, 992620), (124, 656410), (155, 525128), (164, 496310), (205, 397048), (248, 328205), (310, 262564), (328, 248155), (410, 198524), (620, 131282), (820, 99262), (1240, 65641), (1271, 64040), (1601, 50840), (1640, 49631), (2542, 32020), (3202, 25420), (5084, 16010), (6355, 12808), (6404, 12710), (8005, 10168)]