21005388

素因数分解:

$2^2\times 3^2\times {\mathrm{137}}^1\times {\mathrm{4259}}^1$

素因数の和:4406

約数の個数: 36

約数和(自身を含む): 53497080

約数和(自身を除く): 32491692

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 137, 274, 411, 548, 822, 1233, 1644, 2466, 4259, 4932, 8518, 12777, 17036, 25554, 38331, 51108, 76662, 153324, 583483, 1166966, 1750449, 2333932, 3500898, 5251347, 7001796, 10502694, 21005388]

約数ペア:

[(1, 21005388), (2, 10502694), (3, 7001796), (4, 5251347), (6, 3500898), (9, 2333932), (12, 1750449), (18, 1166966), (36, 583483), (137, 153324), (274, 76662), (411, 51108), (548, 38331), (822, 25554), (1233, 17036), (1644, 12777), (2466, 8518), (4259, 4932)]