20538765

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1$

素因数の和:160

約数の個数: 80

約数和(自身を含む): 40981248

約数和(自身を除く): 20442483

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 47, 65, 81, 83, 117, 135, 141, 195, 235, 249, 351, 405, 415, 423, 585, 611, 705, 747, 1053, 1079, 1245, 1269, 1755, 1833, 2115, 2241, 3055, 3237, 3735, 3807, 3901, 5265, 5395, 5499, 6345, 6723, 9165, 9711, 11205, 11703, 16185, 16497, 19035, 19505, 27495, 29133, 33615, 35109, 48555, 49491, 50713, 58515, 82485, 87399, 105327, 145665, 152139, 175545, 247455, 253565, 315981, 436995, 456417, 526635, 760695, 1369251, 1579905, 2282085, 4107753, 6846255, 20538765]

約数ペア:

[(1, 20538765), (3, 6846255), (5, 4107753), (9, 2282085), (13, 1579905), (15, 1369251), (27, 760695), (39, 526635), (45, 456417), (47, 436995), (65, 315981), (81, 253565), (83, 247455), (117, 175545), (135, 152139), (141, 145665), (195, 105327), (235, 87399), (249, 82485), (351, 58515), (405, 50713), (415, 49491), (423, 48555), (585, 35109), (611, 33615), (705, 29133), (747, 27495), (1053, 19505), (1079, 19035), (1245, 16497), (1269, 16185), (1755, 11703), (1833, 11205), (2115, 9711), (2241, 9165), (3055, 6723), (3237, 6345), (3735, 5499), (3807, 5395), (3901, 5265)]