20715860

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{191}}^1$

素因数の和:257

約数の個数: 96

約数和(自身を含む): 52254720

約数和(自身を除く): 31538860

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 29, 34, 44, 55, 58, 68, 85, 110, 116, 145, 170, 187, 191, 220, 290, 319, 340, 374, 382, 493, 580, 638, 748, 764, 935, 955, 986, 1276, 1595, 1870, 1910, 1972, 2101, 2465, 3190, 3247, 3740, 3820, 4202, 4930, 5423, 5539, 6380, 6494, 8404, 9860, 10505, 10846, 11078, 12988, 16235, 21010, 21692, 22156, 27115, 27695, 32470, 35717, 42020, 54230, 55390, 60929, 64940, 71434, 94163, 108460, 110780, 121858, 142868, 178585, 188326, 243716, 304645, 357170, 376652, 470815, 609290, 714340, 941630, 1035793, 1218580, 1883260, 2071586, 4143172, 5178965, 10357930, 20715860]

約数ペア:

[(1, 20715860), (2, 10357930), (4, 5178965), (5, 4143172), (10, 2071586), (11, 1883260), (17, 1218580), (20, 1035793), (22, 941630), (29, 714340), (34, 609290), (44, 470815), (55, 376652), (58, 357170), (68, 304645), (85, 243716), (110, 188326), (116, 178585), (145, 142868), (170, 121858), (187, 110780), (191, 108460), (220, 94163), (290, 71434), (319, 64940), (340, 60929), (374, 55390), (382, 54230), (493, 42020), (580, 35717), (638, 32470), (748, 27695), (764, 27115), (935, 22156), (955, 21692), (986, 21010), (1276, 16235), (1595, 12988), (1870, 11078), (1910, 10846), (1972, 10505), (2101, 9860), (2465, 8404), (3190, 6494), (3247, 6380), (3740, 5539), (3820, 5423), (4202, 4930)]