19727240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{643}}^1$

素因数の和:726

約数の個数: 64

約数和(自身を含む): 48686400

約数和(自身を除く): 28959160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 59, 65, 104, 118, 130, 236, 260, 295, 472, 520, 590, 643, 767, 1180, 1286, 1534, 2360, 2572, 3068, 3215, 3835, 5144, 6136, 6430, 7670, 8359, 12860, 15340, 16718, 25720, 30680, 33436, 37937, 41795, 66872, 75874, 83590, 151748, 167180, 189685, 303496, 334360, 379370, 493181, 758740, 986362, 1517480, 1972724, 2465905, 3945448, 4931810, 9863620, 19727240]

約数ペア:

[(1, 19727240), (2, 9863620), (4, 4931810), (5, 3945448), (8, 2465905), (10, 1972724), (13, 1517480), (20, 986362), (26, 758740), (40, 493181), (52, 379370), (59, 334360), (65, 303496), (104, 189685), (118, 167180), (130, 151748), (236, 83590), (260, 75874), (295, 66872), (472, 41795), (520, 37937), (590, 33436), (643, 30680), (767, 25720), (1180, 16718), (1286, 15340), (1534, 12860), (2360, 8359), (2572, 7670), (3068, 6430), (3215, 6136), (3835, 5144)]