71921380

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1\times {\mathrm{631}}^1$

素因数の和:820

約数の個数: 48

約数和(自身を含む): 156078720

約数和(自身を除く): 84157340

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 139, 164, 205, 278, 410, 556, 631, 695, 820, 1262, 1390, 2524, 2780, 3155, 5699, 6310, 11398, 12620, 22796, 25871, 28495, 51742, 56990, 87709, 103484, 113980, 129355, 175418, 258710, 350836, 438545, 517420, 877090, 1754180, 3596069, 7192138, 14384276, 17980345, 35960690, 71921380]

約数ペア:

[(1, 71921380), (2, 35960690), (4, 17980345), (5, 14384276), (10, 7192138), (20, 3596069), (41, 1754180), (82, 877090), (139, 517420), (164, 438545), (205, 350836), (278, 258710), (410, 175418), (556, 129355), (631, 113980), (695, 103484), (820, 87709), (1262, 56990), (1390, 51742), (2524, 28495), (2780, 25871), (3155, 22796), (5699, 12620), (6310, 11398)]