21115251

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:208

約数の個数: 36

約数和(自身を含む): 33006792

約数和(自身を除く): 11891541

約数列:

[1, 3, 9, 19, 57, 67, 97, 171, 201, 291, 361, 603, 873, 1083, 1273, 1843, 3249, 3819, 5529, 6499, 11457, 16587, 19497, 24187, 35017, 58491, 72561, 105051, 123481, 217683, 315153, 370443, 1111329, 2346139, 7038417, 21115251]

約数ペア:

[(1, 21115251), (3, 7038417), (9, 2346139), (19, 1111329), (57, 370443), (67, 315153), (97, 217683), (171, 123481), (201, 105051), (291, 72561), (361, 58491), (603, 35017), (873, 24187), (1083, 19497), (1273, 16587), (1843, 11457), (3249, 6499), (3819, 5529)]