21521189540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{472163}}^1$

素因数の和:472268

約数の個数: 48

約数和(自身を含む): 47118189888

約数和(自身を除く): 25597000348

約数列:

[1, 2, 4, 5, 10, 20, 43, 53, 86, 106, 172, 212, 215, 265, 430, 530, 860, 1060, 2279, 4558, 9116, 11395, 22790, 45580, 472163, 944326, 1888652, 2360815, 4721630, 9443260, 20303009, 25024639, 40606018, 50049278, 81212036, 100098556, 101515045, 125123195, 203030090, 250246390, 406060180, 500492780, 1076059477, 2152118954, 4304237908, 5380297385, 10760594770, 21521189540]

約数ペア:

[(1, 21521189540), (2, 10760594770), (4, 5380297385), (5, 4304237908), (10, 2152118954), (20, 1076059477), (43, 500492780), (53, 406060180), (86, 250246390), (106, 203030090), (172, 125123195), (212, 101515045), (215, 100098556), (265, 81212036), (430, 50049278), (530, 40606018), (860, 25024639), (1060, 20303009), (2279, 9443260), (4558, 4721630), (9116, 2360815), (11395, 1888652), (22790, 944326), (45580, 472163)]