21516220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{523}}^1$

素因数の和:571

約数の個数: 72

約数和(自身を含む): 52687152

約数和(自身を除く): 31170932

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 121, 170, 187, 220, 242, 340, 374, 484, 523, 605, 748, 935, 1046, 1210, 1870, 2057, 2092, 2420, 2615, 3740, 4114, 5230, 5753, 8228, 8891, 10285, 10460, 11506, 17782, 20570, 23012, 28765, 35564, 41140, 44455, 57530, 63283, 88910, 97801, 115060, 126566, 177820, 195602, 253132, 316415, 391204, 489005, 632830, 978010, 1075811, 1265660, 1956020, 2151622, 4303244, 5379055, 10758110, 21516220]

約数ペア:

[(1, 21516220), (2, 10758110), (4, 5379055), (5, 4303244), (10, 2151622), (11, 1956020), (17, 1265660), (20, 1075811), (22, 978010), (34, 632830), (44, 489005), (55, 391204), (68, 316415), (85, 253132), (110, 195602), (121, 177820), (170, 126566), (187, 115060), (220, 97801), (242, 88910), (340, 63283), (374, 57530), (484, 44455), (523, 41140), (605, 35564), (748, 28765), (935, 23012), (1046, 20570), (1210, 17782), (1870, 11506), (2057, 10460), (2092, 10285), (2420, 8891), (2615, 8228), (3740, 5753), (4114, 5230)]