21901407

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{271}}^1$

素因数の和:395

約数の個数: 32

約数和(自身を含む): 33423360

約数和(自身を除く): 11521953

約数列:

[1, 3, 11, 31, 33, 79, 93, 237, 271, 341, 813, 869, 1023, 2449, 2607, 2981, 7347, 8401, 8943, 21409, 25203, 26939, 64227, 80817, 92411, 235499, 277233, 663679, 706497, 1991037, 7300469, 21901407]

約数ペア:

[(1, 21901407), (3, 7300469), (11, 1991037), (31, 706497), (33, 663679), (79, 277233), (93, 235499), (237, 92411), (271, 80817), (341, 64227), (813, 26939), (869, 25203), (1023, 21409), (2449, 8943), (2607, 8401), (2981, 7347)]