21477460

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{349}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 48157200

約数和(自身を除く): 26679740

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 181, 340, 349, 362, 698, 724, 905, 1396, 1745, 1810, 3077, 3490, 3620, 5933, 6154, 6980, 11866, 12308, 15385, 23732, 29665, 30770, 59330, 61540, 63169, 118660, 126338, 252676, 315845, 631690, 1073873, 1263380, 2147746, 4295492, 5369365, 10738730, 21477460]

約数ペア:

[(1, 21477460), (2, 10738730), (4, 5369365), (5, 4295492), (10, 2147746), (17, 1263380), (20, 1073873), (34, 631690), (68, 315845), (85, 252676), (170, 126338), (181, 118660), (340, 63169), (349, 61540), (362, 59330), (698, 30770), (724, 29665), (905, 23732), (1396, 15385), (1745, 12308), (1810, 11866), (3077, 6980), (3490, 6154), (3620, 5933)]