20512380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{6977}}^1$

素因数の和:7003

約数の個数: 72

約数和(自身を含む): 66821328

約数和(自身を除く): 46308948

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 6977, 13954, 20931, 27908, 34885, 41862, 48839, 69770, 83724, 97678, 104655, 139540, 146517, 195356, 209310, 244195, 293034, 341873, 418620, 488390, 586068, 683746, 732585, 976780, 1025619, 1367492, 1465170, 1709365, 2051238, 2930340, 3418730, 4102476, 5128095, 6837460, 10256190, 20512380]

約数ペア:

[(1, 20512380), (2, 10256190), (3, 6837460), (4, 5128095), (5, 4102476), (6, 3418730), (7, 2930340), (10, 2051238), (12, 1709365), (14, 1465170), (15, 1367492), (20, 1025619), (21, 976780), (28, 732585), (30, 683746), (35, 586068), (42, 488390), (49, 418620), (60, 341873), (70, 293034), (84, 244195), (98, 209310), (105, 195356), (140, 146517), (147, 139540), (196, 104655), (210, 97678), (245, 83724), (294, 69770), (420, 48839), (490, 41862), (588, 34885), (735, 27908), (980, 20931), (1470, 13954), (2940, 6977)]