64643720

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{19471}}^1$

素因数の和:19565

約数の個数: 32

約数和(自身を含む): 147208320

約数和(自身を除く): 82564600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 19471, 38942, 77884, 97355, 155768, 194710, 389420, 778840, 1616093, 3232186, 6464372, 8080465, 12928744, 16160930, 32321860, 64643720]

約数ペア:

[(1, 64643720), (2, 32321860), (4, 16160930), (5, 12928744), (8, 8080465), (10, 6464372), (20, 3232186), (40, 1616093), (83, 778840), (166, 389420), (332, 194710), (415, 155768), (664, 97355), (830, 77884), (1660, 38942), (3320, 19471)]