21892717

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{79}}^1$

素因数の和:217

約数の個数: 32

約数和(自身を含む): 28569600

約数和(自身を除く): 6676883

約数列:

[1, 7, 11, 59, 61, 77, 79, 413, 427, 553, 649, 671, 869, 3599, 4543, 4661, 4697, 4819, 6083, 25193, 32627, 33733, 39589, 51271, 53009, 277123, 284321, 358897, 371063, 1990247, 3127531, 21892717]

約数ペア:

[(1, 21892717), (7, 3127531), (11, 1990247), (59, 371063), (61, 358897), (77, 284321), (79, 277123), (413, 53009), (427, 51271), (553, 39589), (649, 33733), (671, 32627), (869, 25193), (3599, 6083), (4543, 4819), (4661, 4697)]