21400040

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{11383}}^1$

素因数の和:11441

約数の個数: 32

約数和(自身を含む): 49178880

約数和(自身を除く): 27778840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 11383, 22766, 45532, 56915, 91064, 113830, 227660, 455320, 535001, 1070002, 2140004, 2675005, 4280008, 5350010, 10700020, 21400040]

約数ペア:

[(1, 21400040), (2, 10700020), (4, 5350010), (5, 4280008), (8, 2675005), (10, 2140004), (20, 1070002), (40, 535001), (47, 455320), (94, 227660), (188, 113830), (235, 91064), (376, 56915), (470, 45532), (940, 22766), (1880, 11383)]