20668760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{761}}^1$

素因数の和:876

約数の個数: 64

約数和(自身を含む): 53766720

約数和(自身を除く): 33097960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 97, 140, 194, 280, 388, 485, 679, 761, 776, 970, 1358, 1522, 1940, 2716, 3044, 3395, 3805, 3880, 5327, 5432, 6088, 6790, 7610, 10654, 13580, 15220, 21308, 26635, 27160, 30440, 42616, 53270, 73817, 106540, 147634, 213080, 295268, 369085, 516719, 590536, 738170, 1033438, 1476340, 2066876, 2583595, 2952680, 4133752, 5167190, 10334380, 20668760]

約数ペア:

[(1, 20668760), (2, 10334380), (4, 5167190), (5, 4133752), (7, 2952680), (8, 2583595), (10, 2066876), (14, 1476340), (20, 1033438), (28, 738170), (35, 590536), (40, 516719), (56, 369085), (70, 295268), (97, 213080), (140, 147634), (194, 106540), (280, 73817), (388, 53270), (485, 42616), (679, 30440), (761, 27160), (776, 26635), (970, 21308), (1358, 15220), (1522, 13580), (1940, 10654), (2716, 7610), (3044, 6790), (3395, 6088), (3805, 5432), (3880, 5327)]