20123809840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^2\times {\mathrm{870407}}^1$

素因数の和:870454

約数の個数: 60

約数和(自身を含む): 49702037616

約数和(自身を除く): 29578227776

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 289, 340, 578, 680, 1156, 1360, 1445, 2312, 2890, 4624, 5780, 11560, 23120, 870407, 1740814, 3481628, 4352035, 6963256, 8704070, 13926512, 14796919, 17408140, 29593838, 34816280, 59187676, 69632560, 73984595, 118375352, 147969190, 236750704, 251547623, 295938380, 503095246, 591876760, 1006190492, 1183753520, 1257738115, 2012380984, 2515476230, 4024761968, 5030952460, 10061904920, 20123809840]

約数ペア:

[(1, 20123809840), (2, 10061904920), (4, 5030952460), (5, 4024761968), (8, 2515476230), (10, 2012380984), (16, 1257738115), (17, 1183753520), (20, 1006190492), (34, 591876760), (40, 503095246), (68, 295938380), (80, 251547623), (85, 236750704), (136, 147969190), (170, 118375352), (272, 73984595), (289, 69632560), (340, 59187676), (578, 34816280), (680, 29593838), (1156, 17408140), (1360, 14796919), (1445, 13926512), (2312, 8704070), (2890, 6963256), (4624, 4352035), (5780, 3481628), (11560, 1740814), (23120, 870407)]