217985940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{19853}}^1$

素因数の和:19929

約数の個数: 72

約数和(自身を含む): 672097608

約数和(自身を除く): 454111668

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 61, 90, 122, 180, 183, 244, 305, 366, 549, 610, 732, 915, 1098, 1220, 1830, 2196, 2745, 3660, 5490, 10980, 19853, 39706, 59559, 79412, 99265, 119118, 178677, 198530, 238236, 297795, 357354, 397060, 595590, 714708, 893385, 1191180, 1211033, 1786770, 2422066, 3573540, 3633099, 4844132, 6055165, 7266198, 10899297, 12110330, 14532396, 18165495, 21798594, 24220660, 36330990, 43597188, 54496485, 72661980, 108992970, 217985940]

約数ペア:

[(1, 217985940), (2, 108992970), (3, 72661980), (4, 54496485), (5, 43597188), (6, 36330990), (9, 24220660), (10, 21798594), (12, 18165495), (15, 14532396), (18, 12110330), (20, 10899297), (30, 7266198), (36, 6055165), (45, 4844132), (60, 3633099), (61, 3573540), (90, 2422066), (122, 1786770), (180, 1211033), (183, 1191180), (244, 893385), (305, 714708), (366, 595590), (549, 397060), (610, 357354), (732, 297795), (915, 238236), (1098, 198530), (1220, 178677), (1830, 119118), (2196, 99265), (2745, 79412), (3660, 59559), (5490, 39706), (10980, 19853)]