81070640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2039}}^1$

素因数の和:2130

約数の個数: 80

約数和(自身を含む): 218557440

約数和(自身を除く): 137486800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 497, 560, 568, 710, 994, 1136, 1420, 1988, 2039, 2485, 2840, 3976, 4078, 4970, 5680, 7952, 8156, 9940, 10195, 14273, 16312, 19880, 20390, 28546, 32624, 39760, 40780, 57092, 71365, 81560, 114184, 142730, 144769, 163120, 228368, 285460, 289538, 570920, 579076, 723845, 1013383, 1141840, 1158152, 1447690, 2026766, 2316304, 2895380, 4053532, 5066915, 5790760, 8107064, 10133830, 11581520, 16214128, 20267660, 40535320, 81070640]

約数ペア:

[(1, 81070640), (2, 40535320), (4, 20267660), (5, 16214128), (7, 11581520), (8, 10133830), (10, 8107064), (14, 5790760), (16, 5066915), (20, 4053532), (28, 2895380), (35, 2316304), (40, 2026766), (56, 1447690), (70, 1158152), (71, 1141840), (80, 1013383), (112, 723845), (140, 579076), (142, 570920), (280, 289538), (284, 285460), (355, 228368), (497, 163120), (560, 144769), (568, 142730), (710, 114184), (994, 81560), (1136, 71365), (1420, 57092), (1988, 40780), (2039, 39760), (2485, 32624), (2840, 28546), (3976, 20390), (4078, 19880), (4970, 16312), (5680, 14273), (7952, 10195), (8156, 9940)]