21900620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{503}}^1$

素因数の和:830

約数の個数: 48

約数和(自身を含む): 52835328

約数和(自身を除く): 30934708

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 311, 503, 622, 1006, 1244, 1555, 2012, 2177, 2515, 3110, 3521, 4354, 5030, 6220, 7042, 8708, 10060, 10885, 14084, 17605, 21770, 35210, 43540, 70420, 156433, 312866, 625732, 782165, 1095031, 1564330, 2190062, 3128660, 4380124, 5475155, 10950310, 21900620]

約数ペア:

[(1, 21900620), (2, 10950310), (4, 5475155), (5, 4380124), (7, 3128660), (10, 2190062), (14, 1564330), (20, 1095031), (28, 782165), (35, 625732), (70, 312866), (140, 156433), (311, 70420), (503, 43540), (622, 35210), (1006, 21770), (1244, 17605), (1555, 14084), (2012, 10885), (2177, 10060), (2515, 8708), (3110, 7042), (3521, 6220), (4354, 5030)]