21205970

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1579}}^1$

素因数の和:1682

約数の個数: 32

約数和(自身を含む): 40953600

約数和(自身を除く): 19747630

約数列:

[1, 2, 5, 10, 17, 34, 79, 85, 158, 170, 395, 790, 1343, 1579, 2686, 3158, 6715, 7895, 13430, 15790, 26843, 53686, 124741, 134215, 249482, 268430, 623705, 1247410, 2120597, 4241194, 10602985, 21205970]

約数ペア:

[(1, 21205970), (2, 10602985), (5, 4241194), (10, 2120597), (17, 1247410), (34, 623705), (79, 268430), (85, 249482), (158, 134215), (170, 124741), (395, 53686), (790, 26843), (1343, 15790), (1579, 13430), (2686, 7895), (3158, 6715)]