81518720

素因数分解:

$2^7\times 5^1\times {\mathrm{127373}}^1$

素因数の和:127392

約数の個数: 32

約数和(自身を含む): 194882220

約数和(自身を除く): 113363500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127373, 254746, 509492, 636865, 1018984, 1273730, 2037968, 2547460, 4075936, 5094920, 8151872, 10189840, 16303744, 20379680, 40759360, 81518720]

約数ペア:

[(1, 81518720), (2, 40759360), (4, 20379680), (5, 16303744), (8, 10189840), (10, 8151872), (16, 5094920), (20, 4075936), (32, 2547460), (40, 2037968), (64, 1273730), (80, 1018984), (128, 636865), (160, 509492), (320, 254746), (640, 127373)]