20565531440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1319}}^1\times {\mathrm{6287}}^1$

素因数の和:7650

約数の個数: 80

約数和(自身を含む): 49402552320

約数和(自身を除く): 28837020880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 1319, 2480, 2638, 5276, 6287, 6595, 10552, 12574, 13190, 21104, 25148, 26380, 31435, 40889, 50296, 52760, 62870, 81778, 100592, 105520, 125740, 163556, 194897, 204445, 251480, 327112, 389794, 408890, 502960, 654224, 779588, 817780, 974485, 1559176, 1635560, 1948970, 3118352, 3271120, 3897940, 7795880, 8292553, 15591760, 16585106, 33170212, 41462765, 66340424, 82925530, 132680848, 165851060, 257069143, 331702120, 514138286, 663404240, 1028276572, 1285345715, 2056553144, 2570691430, 4113106288, 5141382860, 10282765720, 20565531440]

約数ペア:

[(1, 20565531440), (2, 10282765720), (4, 5141382860), (5, 4113106288), (8, 2570691430), (10, 2056553144), (16, 1285345715), (20, 1028276572), (31, 663404240), (40, 514138286), (62, 331702120), (80, 257069143), (124, 165851060), (155, 132680848), (248, 82925530), (310, 66340424), (496, 41462765), (620, 33170212), (1240, 16585106), (1319, 15591760), (2480, 8292553), (2638, 7795880), (5276, 3897940), (6287, 3271120), (6595, 3118352), (10552, 1948970), (12574, 1635560), (13190, 1559176), (21104, 974485), (25148, 817780), (26380, 779588), (31435, 654224), (40889, 502960), (50296, 408890), (52760, 389794), (62870, 327112), (81778, 251480), (100592, 204445), (105520, 194897), (125740, 163556)]