21059480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40499}}^1$

素因数の和:40523

約数の個数: 32

約数和(自身を含む): 51030000

約数和(自身を除く): 29970520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40499, 80998, 161996, 202495, 323992, 404990, 526487, 809980, 1052974, 1619960, 2105948, 2632435, 4211896, 5264870, 10529740, 21059480]

約数ペア:

[(1, 21059480), (2, 10529740), (4, 5264870), (5, 4211896), (8, 2632435), (10, 2105948), (13, 1619960), (20, 1052974), (26, 809980), (40, 526487), (52, 404990), (65, 323992), (104, 202495), (130, 161996), (260, 80998), (520, 40499)]