20321720

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6121}}^1$

素因数の和:6215

約数の個数: 32

約数和(自身を含む): 46282320

約数和(自身を除く): 25960600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6121, 12242, 24484, 30605, 48968, 61210, 122420, 244840, 508043, 1016086, 2032172, 2540215, 4064344, 5080430, 10160860, 20321720]

約数ペア:

[(1, 20321720), (2, 10160860), (4, 5080430), (5, 4064344), (8, 2540215), (10, 2032172), (20, 1016086), (40, 508043), (83, 244840), (166, 122420), (332, 61210), (415, 48968), (664, 30605), (830, 24484), (1660, 12242), (3320, 6121)]