81878480

素因数分解:

$2^4\times 5^1\times {\mathrm{149}}^1\times {\mathrm{6869}}^1$

素因数の和:7031

約数の個数: 40

約数和(自身を含む): 191673000

約数和(自身を除く): 109794520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 149, 298, 596, 745, 1192, 1490, 2384, 2980, 5960, 6869, 11920, 13738, 27476, 34345, 54952, 68690, 109904, 137380, 274760, 549520, 1023481, 2046962, 4093924, 5117405, 8187848, 10234810, 16375696, 20469620, 40939240, 81878480]

約数ペア:

[(1, 81878480), (2, 40939240), (4, 20469620), (5, 16375696), (8, 10234810), (10, 8187848), (16, 5117405), (20, 4093924), (40, 2046962), (80, 1023481), (149, 549520), (298, 274760), (596, 137380), (745, 109904), (1192, 68690), (1490, 54952), (2384, 34345), (2980, 27476), (5960, 13738), (6869, 11920)]