65881720

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{4027}}^1$

素因数の和:4447

約数の個数: 32

約数和(自身を含む): 148633200

約数和(自身を除く): 82751480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1636, 2045, 3272, 4027, 4090, 8054, 8180, 16108, 16360, 20135, 32216, 40270, 80540, 161080, 1647043, 3294086, 6588172, 8235215, 13176344, 16470430, 32940860, 65881720]

約数ペア:

[(1, 65881720), (2, 32940860), (4, 16470430), (5, 13176344), (8, 8235215), (10, 6588172), (20, 3294086), (40, 1647043), (409, 161080), (818, 80540), (1636, 40270), (2045, 32216), (3272, 20135), (4027, 16360), (4090, 16108), (8054, 8180)]