21003908

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{499}}^1\times {\mathrm{619}}^1$

素因数の和:1139

約数の個数: 24

約数和(自身を含む): 39060000

約数和(自身を除く): 18056092

約数列:

[1, 2, 4, 17, 34, 68, 499, 619, 998, 1238, 1996, 2476, 8483, 10523, 16966, 21046, 33932, 42092, 308881, 617762, 1235524, 5250977, 10501954, 21003908]

約数ペア:

[(1, 21003908), (2, 10501954), (4, 5250977), (17, 1235524), (34, 617762), (68, 308881), (499, 42092), (619, 33932), (998, 21046), (1238, 16966), (1996, 10523), (2476, 8483)]