19810665

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1031}}^1$

素因数の和:1110

約数の個数: 48

約数和(自身を含む): 39926016

約数和(自身を除く): 20115351

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 61, 63, 105, 183, 305, 315, 427, 549, 915, 1031, 1281, 2135, 2745, 3093, 3843, 5155, 6405, 7217, 9279, 15465, 19215, 21651, 36085, 46395, 62891, 64953, 108255, 188673, 314455, 324765, 440237, 566019, 943365, 1320711, 2201185, 2830095, 3962133, 6603555, 19810665]

約数ペア:

[(1, 19810665), (3, 6603555), (5, 3962133), (7, 2830095), (9, 2201185), (15, 1320711), (21, 943365), (35, 566019), (45, 440237), (61, 324765), (63, 314455), (105, 188673), (183, 108255), (305, 64953), (315, 62891), (427, 46395), (549, 36085), (915, 21651), (1031, 19215), (1281, 15465), (2135, 9279), (2745, 7217), (3093, 6405), (3843, 5155)]