20123920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{14797}}^1$

素因数の和:14827

約数の個数: 40

約数和(自身を含む): 49543704

約数和(自身を除く): 29419784

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 14797, 29594, 59188, 73985, 118376, 147970, 236752, 251549, 295940, 503098, 591880, 1006196, 1183760, 1257745, 2012392, 2515490, 4024784, 5030980, 10061960, 20123920]

約数ペア:

[(1, 20123920), (2, 10061960), (4, 5030980), (5, 4024784), (8, 2515490), (10, 2012392), (16, 1257745), (17, 1183760), (20, 1006196), (34, 591880), (40, 503098), (68, 295940), (80, 251549), (85, 236752), (136, 147970), (170, 118376), (272, 73985), (340, 59188), (680, 29594), (1360, 14797)]