18745040

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{4421}}^1$

素因数の和:4487

約数の個数: 40

約数和(自身を含む): 44414568

約数和(自身を除く): 25669528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 265, 424, 530, 848, 1060, 2120, 4240, 4421, 8842, 17684, 22105, 35368, 44210, 70736, 88420, 176840, 234313, 353680, 468626, 937252, 1171565, 1874504, 2343130, 3749008, 4686260, 9372520, 18745040]

約数ペア:

[(1, 18745040), (2, 9372520), (4, 4686260), (5, 3749008), (8, 2343130), (10, 1874504), (16, 1171565), (20, 937252), (40, 468626), (53, 353680), (80, 234313), (106, 176840), (212, 88420), (265, 70736), (424, 44210), (530, 35368), (848, 22105), (1060, 17684), (2120, 8842), (4240, 4421)]