20972259

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{571}}^1$

素因数の和:648

約数の個数: 48

約数和(自身を含む): 38548224

約数和(自身を除く): 17575965

約数列:

[1, 3, 7, 9, 11, 21, 33, 53, 63, 77, 99, 159, 231, 371, 477, 571, 583, 693, 1113, 1713, 1749, 3339, 3997, 4081, 5139, 5247, 6281, 11991, 12243, 18843, 30263, 35973, 36729, 43967, 56529, 90789, 131901, 211841, 272367, 332893, 395703, 635523, 998679, 1906569, 2330251, 2996037, 6990753, 20972259]

約数ペア:

[(1, 20972259), (3, 6990753), (7, 2996037), (9, 2330251), (11, 1906569), (21, 998679), (33, 635523), (53, 395703), (63, 332893), (77, 272367), (99, 211841), (159, 131901), (231, 90789), (371, 56529), (477, 43967), (571, 36729), (583, 35973), (693, 30263), (1113, 18843), (1713, 12243), (1749, 11991), (3339, 6281), (3997, 5247), (4081, 5139)]