87697780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{409}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 188455680

約数和(自身を除く): 100757900

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 151, 284, 302, 355, 409, 604, 710, 755, 818, 1420, 1510, 1636, 2045, 3020, 4090, 8180, 10721, 21442, 29039, 42884, 53605, 58078, 61759, 107210, 116156, 123518, 145195, 214420, 247036, 290390, 308795, 580780, 617590, 1235180, 4384889, 8769778, 17539556, 21924445, 43848890, 87697780]

約数ペア:

[(1, 87697780), (2, 43848890), (4, 21924445), (5, 17539556), (10, 8769778), (20, 4384889), (71, 1235180), (142, 617590), (151, 580780), (284, 308795), (302, 290390), (355, 247036), (409, 214420), (604, 145195), (710, 123518), (755, 116156), (818, 107210), (1420, 61759), (1510, 58078), (1636, 53605), (2045, 42884), (3020, 29039), (4090, 21442), (8180, 10721)]