21588640

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7937}}^1$

素因数の和:7969

約数の個数: 48

約数和(自身を含む): 54010152

約数和(自身を除く): 32421512

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7937, 15874, 31748, 39685, 63496, 79370, 126992, 134929, 158740, 253984, 269858, 317480, 539716, 634960, 674645, 1079432, 1269920, 1349290, 2158864, 2698580, 4317728, 5397160, 10794320, 21588640]

約数ペア:

[(1, 21588640), (2, 10794320), (4, 5397160), (5, 4317728), (8, 2698580), (10, 2158864), (16, 1349290), (17, 1269920), (20, 1079432), (32, 674645), (34, 634960), (40, 539716), (68, 317480), (80, 269858), (85, 253984), (136, 158740), (160, 134929), (170, 126992), (272, 79370), (340, 63496), (544, 39685), (680, 31748), (1360, 15874), (2720, 7937)]