20397160

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{751}}^1$

素因数の和:866

約数の個数: 64

約数和(自身を含む): 53061120

約数和(自身を除く): 32663960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 97, 140, 194, 280, 388, 485, 679, 751, 776, 970, 1358, 1502, 1940, 2716, 3004, 3395, 3755, 3880, 5257, 5432, 6008, 6790, 7510, 10514, 13580, 15020, 21028, 26285, 27160, 30040, 42056, 52570, 72847, 105140, 145694, 210280, 291388, 364235, 509929, 582776, 728470, 1019858, 1456940, 2039716, 2549645, 2913880, 4079432, 5099290, 10198580, 20397160]

約数ペア:

[(1, 20397160), (2, 10198580), (4, 5099290), (5, 4079432), (7, 2913880), (8, 2549645), (10, 2039716), (14, 1456940), (20, 1019858), (28, 728470), (35, 582776), (40, 509929), (56, 364235), (70, 291388), (97, 210280), (140, 145694), (194, 105140), (280, 72847), (388, 52570), (485, 42056), (679, 30040), (751, 27160), (776, 26285), (970, 21028), (1358, 15020), (1502, 13580), (1940, 10514), (2716, 7510), (3004, 6790), (3395, 6008), (3755, 5432), (3880, 5257)]