19724720

素因数分解:

$2^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{3121}}^1$

素因数の和:3213

約数の個数: 40

約数和(自身を含む): 46455360

約数和(自身を除く): 26730640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 79, 80, 158, 316, 395, 632, 790, 1264, 1580, 3121, 3160, 6242, 6320, 12484, 15605, 24968, 31210, 49936, 62420, 124840, 246559, 249680, 493118, 986236, 1232795, 1972472, 2465590, 3944944, 4931180, 9862360, 19724720]

約数ペア:

[(1, 19724720), (2, 9862360), (4, 4931180), (5, 3944944), (8, 2465590), (10, 1972472), (16, 1232795), (20, 986236), (40, 493118), (79, 249680), (80, 246559), (158, 124840), (316, 62420), (395, 49936), (632, 31210), (790, 24968), (1264, 15605), (1580, 12484), (3121, 6320), (3160, 6242)]