81062720

素因数分解:

$2^6\times 5^1\times {\mathrm{253321}}^1$

素因数の和:253338

約数の個数: 28

約数和(自身を含む): 193031364

約数和(自身を除く): 111968644

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 253321, 506642, 1013284, 1266605, 2026568, 2533210, 4053136, 5066420, 8106272, 10132840, 16212544, 20265680, 40531360, 81062720]

約数ペア:

[(1, 81062720), (2, 40531360), (4, 20265680), (5, 16212544), (8, 10132840), (10, 8106272), (16, 5066420), (20, 4053136), (32, 2533210), (40, 2026568), (64, 1266605), (80, 1013284), (160, 506642), (320, 253321)]