20752180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{563}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 46428480

約数和(自身を除く): 25676300

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 97, 190, 194, 380, 388, 485, 563, 970, 1126, 1843, 1940, 2252, 2815, 3686, 5630, 7372, 9215, 10697, 11260, 18430, 21394, 36860, 42788, 53485, 54611, 106970, 109222, 213940, 218444, 273055, 546110, 1037609, 1092220, 2075218, 4150436, 5188045, 10376090, 20752180]

約数ペア:

[(1, 20752180), (2, 10376090), (4, 5188045), (5, 4150436), (10, 2075218), (19, 1092220), (20, 1037609), (38, 546110), (76, 273055), (95, 218444), (97, 213940), (190, 109222), (194, 106970), (380, 54611), (388, 53485), (485, 42788), (563, 36860), (970, 21394), (1126, 18430), (1843, 11260), (1940, 10697), (2252, 9215), (2815, 7372), (3686, 5630)]