21750855

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{293}}^1$

素因数の和:416

約数の個数: 48

約数和(自身を含む): 41023584

約数和(自身を除く): 19272729

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 101, 105, 147, 245, 293, 303, 505, 707, 735, 879, 1465, 1515, 2051, 2121, 3535, 4395, 4949, 6153, 10255, 10605, 14357, 14847, 24745, 29593, 30765, 43071, 71785, 74235, 88779, 147965, 207151, 215355, 443895, 621453, 1035755, 1450057, 3107265, 4350171, 7250285, 21750855]

約数ペア:

[(1, 21750855), (3, 7250285), (5, 4350171), (7, 3107265), (15, 1450057), (21, 1035755), (35, 621453), (49, 443895), (101, 215355), (105, 207151), (147, 147965), (245, 88779), (293, 74235), (303, 71785), (505, 43071), (707, 30765), (735, 29593), (879, 24745), (1465, 14847), (1515, 14357), (2051, 10605), (2121, 10255), (3535, 6153), (4395, 4949)]