20788940

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{491}}^1$

素因数の和:602

約数の個数: 48

約数和(自身を含む): 45874080

約数和(自身を除く): 25085140

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 73, 116, 145, 146, 290, 292, 365, 491, 580, 730, 982, 1460, 1964, 2117, 2455, 4234, 4910, 8468, 9820, 10585, 14239, 21170, 28478, 35843, 42340, 56956, 71195, 71686, 142390, 143372, 179215, 284780, 358430, 716860, 1039447, 2078894, 4157788, 5197235, 10394470, 20788940]

約数ペア:

[(1, 20788940), (2, 10394470), (4, 5197235), (5, 4157788), (10, 2078894), (20, 1039447), (29, 716860), (58, 358430), (73, 284780), (116, 179215), (145, 143372), (146, 142390), (290, 71686), (292, 71195), (365, 56956), (491, 42340), (580, 35843), (730, 28478), (982, 21170), (1460, 14239), (1964, 10585), (2117, 9820), (2455, 8468), (4234, 4910)]