21046220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1327}}^1$

素因数の和:1410

約数の個数: 48

約数和(自身を含む): 48413568

約数和(自身を除く): 27367348

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 122, 130, 244, 260, 305, 610, 793, 1220, 1327, 1586, 2654, 3172, 3965, 5308, 6635, 7930, 13270, 15860, 17251, 26540, 34502, 69004, 80947, 86255, 161894, 172510, 323788, 345020, 404735, 809470, 1052311, 1618940, 2104622, 4209244, 5261555, 10523110, 21046220]

約数ペア:

[(1, 21046220), (2, 10523110), (4, 5261555), (5, 4209244), (10, 2104622), (13, 1618940), (20, 1052311), (26, 809470), (52, 404735), (61, 345020), (65, 323788), (122, 172510), (130, 161894), (244, 86255), (260, 80947), (305, 69004), (610, 34502), (793, 26540), (1220, 17251), (1327, 15860), (1586, 13270), (2654, 7930), (3172, 6635), (3965, 5308)]