19802139

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{211}}^1$

素因数の和:371

約数の個数: 32

約数和(自身を含む): 31342080

約数和(自身を除く): 11539941

約数列:

[1, 3, 7, 21, 41, 109, 123, 211, 287, 327, 633, 763, 861, 1477, 2289, 4431, 4469, 8651, 13407, 22999, 25953, 31283, 60557, 68997, 93849, 160993, 181671, 482979, 942959, 2828877, 6600713, 19802139]

約数ペア:

[(1, 19802139), (3, 6600713), (7, 2828877), (21, 942959), (41, 482979), (109, 181671), (123, 160993), (211, 93849), (287, 68997), (327, 60557), (633, 31283), (763, 25953), (861, 22999), (1477, 13407), (2289, 8651), (4431, 4469)]