21154840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{75553}}^1$

素因数の和:75571

約数の個数: 32

約数和(自身を含む): 54398880

約数和(自身を除く): 33244040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 75553, 151106, 302212, 377765, 528871, 604424, 755530, 1057742, 1511060, 2115484, 2644355, 3022120, 4230968, 5288710, 10577420, 21154840]

約数ペア:

[(1, 21154840), (2, 10577420), (4, 5288710), (5, 4230968), (7, 3022120), (8, 2644355), (10, 2115484), (14, 1511060), (20, 1057742), (28, 755530), (35, 604424), (40, 528871), (56, 377765), (70, 302212), (140, 151106), (280, 75553)]