21212900

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^2\times {\mathrm{401}}^1$

素因数の和:461

約数の個数: 54

約数和(自身を含む): 48240402

約数和(自身を除く): 27027502

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 92, 100, 115, 230, 401, 460, 529, 575, 802, 1058, 1150, 1604, 2005, 2116, 2300, 2645, 4010, 5290, 8020, 9223, 10025, 10580, 13225, 18446, 20050, 26450, 36892, 40100, 46115, 52900, 92230, 184460, 212129, 230575, 424258, 461150, 848516, 922300, 1060645, 2121290, 4242580, 5303225, 10606450, 21212900]

約数ペア:

[(1, 21212900), (2, 10606450), (4, 5303225), (5, 4242580), (10, 2121290), (20, 1060645), (23, 922300), (25, 848516), (46, 461150), (50, 424258), (92, 230575), (100, 212129), (115, 184460), (230, 92230), (401, 52900), (460, 46115), (529, 40100), (575, 36892), (802, 26450), (1058, 20050), (1150, 18446), (1604, 13225), (2005, 10580), (2116, 10025), (2300, 9223), (2645, 8020), (4010, 5290)]