21520880

素因数分解:

$2^4\times 5^1\times {\mathrm{367}}^1\times {\mathrm{733}}^1$

素因数の和:1113

約数の個数: 40

約数和(自身を含む): 50240832

約数和(自身を除く): 28719952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 367, 733, 734, 1466, 1468, 1835, 2932, 2936, 3665, 3670, 5864, 5872, 7330, 7340, 11728, 14660, 14680, 29320, 29360, 58640, 269011, 538022, 1076044, 1345055, 2152088, 2690110, 4304176, 5380220, 10760440, 21520880]

約数ペア:

[(1, 21520880), (2, 10760440), (4, 5380220), (5, 4304176), (8, 2690110), (10, 2152088), (16, 1345055), (20, 1076044), (40, 538022), (80, 269011), (367, 58640), (733, 29360), (734, 29320), (1466, 14680), (1468, 14660), (1835, 11728), (2932, 7340), (2936, 7330), (3665, 5872), (3670, 5864)]