21425440

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7877}}^1$

素因数の和:7909

約数の個数: 48

約数和(自身を含む): 53601912

約数和(自身を除く): 32176472

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7877, 15754, 31508, 39385, 63016, 78770, 126032, 133909, 157540, 252064, 267818, 315080, 535636, 630160, 669545, 1071272, 1260320, 1339090, 2142544, 2678180, 4285088, 5356360, 10712720, 21425440]

約数ペア:

[(1, 21425440), (2, 10712720), (4, 5356360), (5, 4285088), (8, 2678180), (10, 2142544), (16, 1339090), (17, 1260320), (20, 1071272), (32, 669545), (34, 630160), (40, 535636), (68, 315080), (80, 267818), (85, 252064), (136, 157540), (160, 133909), (170, 126032), (272, 78770), (340, 63016), (544, 39385), (680, 31508), (1360, 15754), (2720, 7877)]