21396560

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3767}}^1$

素因数の和:3851

約数の個数: 40

約数和(自身を含む): 50461056

約数和(自身を除く): 29064496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3767, 5680, 7534, 15068, 18835, 30136, 37670, 60272, 75340, 150680, 267457, 301360, 534914, 1069828, 1337285, 2139656, 2674570, 4279312, 5349140, 10698280, 21396560]

約数ペア:

[(1, 21396560), (2, 10698280), (4, 5349140), (5, 4279312), (8, 2674570), (10, 2139656), (16, 1337285), (20, 1069828), (40, 534914), (71, 301360), (80, 267457), (142, 150680), (284, 75340), (355, 60272), (568, 37670), (710, 30136), (1136, 18835), (1420, 15068), (2840, 7534), (3767, 5680)]