21686973

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{223}}^1\times {\mathrm{421}}^1$

素因数の和:665

約数の個数: 32

約数和(自身を含む): 36298752

約数和(自身を除く): 14611779

約数列:

[1, 3, 7, 11, 21, 33, 77, 223, 231, 421, 669, 1263, 1561, 2453, 2947, 4631, 4683, 7359, 8841, 13893, 17171, 32417, 51513, 93883, 97251, 281649, 657181, 1032713, 1971543, 3098139, 7228991, 21686973]

約数ペア:

[(1, 21686973), (3, 7228991), (7, 3098139), (11, 1971543), (21, 1032713), (33, 657181), (77, 281649), (223, 97251), (231, 93883), (421, 51513), (669, 32417), (1263, 17171), (1561, 13893), (2453, 8841), (2947, 7359), (4631, 4683)]