21221480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3989}}^1$

素因数の和:4026

約数の個数: 64

約数和(自身を含む): 57456000

約数和(自身を除く): 36234520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 70, 76, 95, 133, 140, 152, 190, 266, 280, 380, 532, 665, 760, 1064, 1330, 2660, 3989, 5320, 7978, 15956, 19945, 27923, 31912, 39890, 55846, 75791, 79780, 111692, 139615, 151582, 159560, 223384, 279230, 303164, 378955, 530537, 558460, 606328, 757910, 1061074, 1116920, 1515820, 2122148, 2652685, 3031640, 4244296, 5305370, 10610740, 21221480]

約数ペア:

[(1, 21221480), (2, 10610740), (4, 5305370), (5, 4244296), (7, 3031640), (8, 2652685), (10, 2122148), (14, 1515820), (19, 1116920), (20, 1061074), (28, 757910), (35, 606328), (38, 558460), (40, 530537), (56, 378955), (70, 303164), (76, 279230), (95, 223384), (133, 159560), (140, 151582), (152, 139615), (190, 111692), (266, 79780), (280, 75791), (380, 55846), (532, 39890), (665, 31912), (760, 27923), (1064, 19945), (1330, 15956), (2660, 7978), (3989, 5320)]