21785140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{3643}}^1$

素因数の和:3688

約数の個数: 48

約数和(自身を含む): 51424128

約数和(自身を除く): 29638988

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 65, 92, 115, 130, 230, 260, 299, 460, 598, 1196, 1495, 2990, 3643, 5980, 7286, 14572, 18215, 36430, 47359, 72860, 83789, 94718, 167578, 189436, 236795, 335156, 418945, 473590, 837890, 947180, 1089257, 1675780, 2178514, 4357028, 5446285, 10892570, 21785140]

約数ペア:

[(1, 21785140), (2, 10892570), (4, 5446285), (5, 4357028), (10, 2178514), (13, 1675780), (20, 1089257), (23, 947180), (26, 837890), (46, 473590), (52, 418945), (65, 335156), (92, 236795), (115, 189436), (130, 167578), (230, 94718), (260, 83789), (299, 72860), (460, 47359), (598, 36430), (1196, 18215), (1495, 14572), (2990, 7286), (3643, 5980)]