19945431

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 33266688

約数和(自身を除く): 13321257

約数列:

[1, 3, 9, 11, 31, 33, 67, 93, 97, 99, 201, 279, 291, 341, 603, 737, 873, 1023, 1067, 2077, 2211, 3007, 3069, 3201, 6231, 6499, 6633, 9021, 9603, 18693, 19497, 22847, 27063, 33077, 58491, 68541, 71489, 99231, 201469, 205623, 214467, 297693, 604407, 643401, 1813221, 2216159, 6648477, 19945431]

約数ペア:

[(1, 19945431), (3, 6648477), (9, 2216159), (11, 1813221), (31, 643401), (33, 604407), (67, 297693), (93, 214467), (97, 205623), (99, 201469), (201, 99231), (279, 71489), (291, 68541), (341, 58491), (603, 33077), (737, 27063), (873, 22847), (1023, 19497), (1067, 18693), (2077, 9603), (2211, 9021), (3007, 6633), (3069, 6499), (3201, 6231)]