21643820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{751}}^1$

素因数の和:902

約数の個数: 48

約数和(自身を含む): 50029056

約数和(自身を除く): 28385236

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 131, 220, 262, 524, 655, 751, 1310, 1441, 1502, 2620, 2882, 3004, 3755, 5764, 7205, 7510, 8261, 14410, 15020, 16522, 28820, 33044, 41305, 82610, 98381, 165220, 196762, 393524, 491905, 983810, 1082191, 1967620, 2164382, 4328764, 5410955, 10821910, 21643820]

約数ペア:

[(1, 21643820), (2, 10821910), (4, 5410955), (5, 4328764), (10, 2164382), (11, 1967620), (20, 1082191), (22, 983810), (44, 491905), (55, 393524), (110, 196762), (131, 165220), (220, 98381), (262, 82610), (524, 41305), (655, 33044), (751, 28820), (1310, 16522), (1441, 15020), (1502, 14410), (2620, 8261), (2882, 7510), (3004, 7205), (3755, 5764)]