81225560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{863}}^1$

素因数の和:1068

約数の個数: 64

約数和(自身を含む): 198132480

約数和(自身を除く): 116906920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 181, 260, 362, 520, 724, 863, 905, 1448, 1726, 1810, 2353, 3452, 3620, 4315, 4706, 6904, 7240, 8630, 9412, 11219, 11765, 17260, 18824, 22438, 23530, 34520, 44876, 47060, 56095, 89752, 94120, 112190, 156203, 224380, 312406, 448760, 624812, 781015, 1249624, 1562030, 2030639, 3124060, 4061278, 6248120, 8122556, 10153195, 16245112, 20306390, 40612780, 81225560]

約数ペア:

[(1, 81225560), (2, 40612780), (4, 20306390), (5, 16245112), (8, 10153195), (10, 8122556), (13, 6248120), (20, 4061278), (26, 3124060), (40, 2030639), (52, 1562030), (65, 1249624), (104, 781015), (130, 624812), (181, 448760), (260, 312406), (362, 224380), (520, 156203), (724, 112190), (863, 94120), (905, 89752), (1448, 56095), (1726, 47060), (1810, 44876), (2353, 34520), (3452, 23530), (3620, 22438), (4315, 18824), (4706, 17260), (6904, 11765), (7240, 11219), (8630, 9412)]