21001380

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{571}}^1\times {\mathrm{613}}^1$

素因数の和:1196

約数の個数: 48

約数和(自身を含む): 59002944

約数和(自身を除く): 38001564

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 571, 613, 1142, 1226, 1713, 1839, 2284, 2452, 2855, 3065, 3426, 3678, 5710, 6130, 6852, 7356, 8565, 9195, 11420, 12260, 17130, 18390, 34260, 36780, 350023, 700046, 1050069, 1400092, 1750115, 2100138, 3500230, 4200276, 5250345, 7000460, 10500690, 21001380]

約数ペア:

[(1, 21001380), (2, 10500690), (3, 7000460), (4, 5250345), (5, 4200276), (6, 3500230), (10, 2100138), (12, 1750115), (15, 1400092), (20, 1050069), (30, 700046), (60, 350023), (571, 36780), (613, 34260), (1142, 18390), (1226, 17130), (1713, 12260), (1839, 11420), (2284, 9195), (2452, 8565), (2855, 7356), (3065, 6852), (3426, 6130), (3678, 5710)]