21754220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{587}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 48898080

約数和(自身を除く): 27143860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 109, 170, 218, 340, 436, 545, 587, 1090, 1174, 1853, 2180, 2348, 2935, 3706, 5870, 7412, 9265, 9979, 11740, 18530, 19958, 37060, 39916, 49895, 63983, 99790, 127966, 199580, 255932, 319915, 639830, 1087711, 1279660, 2175422, 4350844, 5438555, 10877110, 21754220]

約数ペア:

[(1, 21754220), (2, 10877110), (4, 5438555), (5, 4350844), (10, 2175422), (17, 1279660), (20, 1087711), (34, 639830), (68, 319915), (85, 255932), (109, 199580), (170, 127966), (218, 99790), (340, 63983), (436, 49895), (545, 39916), (587, 37060), (1090, 19958), (1174, 18530), (1853, 11740), (2180, 9979), (2348, 9265), (2935, 7412), (3706, 5870)]