20618565

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:218

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 18088635

約数列:

[1, 3, 5, 11, 15, 29, 31, 33, 55, 87, 93, 139, 145, 155, 165, 319, 341, 417, 435, 465, 695, 899, 957, 1023, 1529, 1595, 1705, 2085, 2697, 4031, 4309, 4495, 4587, 4785, 5115, 7645, 9889, 12093, 12927, 13485, 20155, 21545, 22935, 29667, 44341, 47399, 49445, 60465, 64635, 124961, 133023, 142197, 148335, 221705, 236995, 374883, 624805, 665115, 710985, 1374571, 1874415, 4123713, 6872855, 20618565]

約数ペア:

[(1, 20618565), (3, 6872855), (5, 4123713), (11, 1874415), (15, 1374571), (29, 710985), (31, 665115), (33, 624805), (55, 374883), (87, 236995), (93, 221705), (139, 148335), (145, 142197), (155, 133023), (165, 124961), (319, 64635), (341, 60465), (417, 49445), (435, 47399), (465, 44341), (695, 29667), (899, 22935), (957, 21545), (1023, 20155), (1529, 13485), (1595, 12927), (1705, 12093), (2085, 9889), (2697, 7645), (4031, 5115), (4309, 4785), (4495, 4587)]