18989680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{13963}}^1$

素因数の和:13993

約数の個数: 40

約数和(自身を含む): 46751472

約数和(自身を除く): 27761792

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 13963, 27926, 55852, 69815, 111704, 139630, 223408, 237371, 279260, 474742, 558520, 949484, 1117040, 1186855, 1898968, 2373710, 3797936, 4747420, 9494840, 18989680]

約数ペア:

[(1, 18989680), (2, 9494840), (4, 4747420), (5, 3797936), (8, 2373710), (10, 1898968), (16, 1186855), (17, 1117040), (20, 949484), (34, 558520), (40, 474742), (68, 279260), (80, 237371), (85, 223408), (136, 139630), (170, 111704), (272, 69815), (340, 55852), (680, 27926), (1360, 13963)]