20199880

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1$

素因数の和:274

約数の個数: 64

約数和(自身を含む): 47401200

約数和(自身を除く): 27201320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 109, 113, 164, 205, 218, 226, 328, 410, 436, 452, 545, 565, 820, 872, 904, 1090, 1130, 1640, 2180, 2260, 4360, 4469, 4520, 4633, 8938, 9266, 12317, 17876, 18532, 22345, 23165, 24634, 35752, 37064, 44690, 46330, 49268, 61585, 89380, 92660, 98536, 123170, 178760, 185320, 246340, 492680, 504997, 1009994, 2019988, 2524985, 4039976, 5049970, 10099940, 20199880]

約数ペア:

[(1, 20199880), (2, 10099940), (4, 5049970), (5, 4039976), (8, 2524985), (10, 2019988), (20, 1009994), (40, 504997), (41, 492680), (82, 246340), (109, 185320), (113, 178760), (164, 123170), (205, 98536), (218, 92660), (226, 89380), (328, 61585), (410, 49268), (436, 46330), (452, 44690), (545, 37064), (565, 35752), (820, 24634), (872, 23165), (904, 22345), (1090, 18532), (1130, 17876), (1640, 12317), (2180, 9266), (2260, 8938), (4360, 4633), (4469, 4520)]