19912912

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{2113}}^1$

素因数の和:2171

約数の個数: 40

約数和(自身を含む): 41941760

約数和(自身を除く): 22028848

約数列:

[1, 2, 4, 8, 16, 19, 31, 38, 62, 76, 124, 152, 248, 304, 496, 589, 1178, 2113, 2356, 4226, 4712, 8452, 9424, 16904, 33808, 40147, 65503, 80294, 131006, 160588, 262012, 321176, 524024, 642352, 1048048, 1244557, 2489114, 4978228, 9956456, 19912912]

約数ペア:

[(1, 19912912), (2, 9956456), (4, 4978228), (8, 2489114), (16, 1244557), (19, 1048048), (31, 642352), (38, 524024), (62, 321176), (76, 262012), (124, 160588), (152, 131006), (248, 80294), (304, 65503), (496, 40147), (589, 33808), (1178, 16904), (2113, 9424), (2356, 8452), (4226, 4712)]