21078160

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{7121}}^1$

素因数の和:7171

約数の個数: 40

約数和(自身を含む): 50338296

約数和(自身を除く): 29260136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 7121, 14242, 28484, 35605, 56968, 71210, 113936, 142420, 263477, 284840, 526954, 569680, 1053908, 1317385, 2107816, 2634770, 4215632, 5269540, 10539080, 21078160]

約数ペア:

[(1, 21078160), (2, 10539080), (4, 5269540), (5, 4215632), (8, 2634770), (10, 2107816), (16, 1317385), (20, 1053908), (37, 569680), (40, 526954), (74, 284840), (80, 263477), (148, 142420), (185, 113936), (296, 71210), (370, 56968), (592, 35605), (740, 28484), (1480, 14242), (2960, 7121)]