21913360

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{359}}^1$

素因数の和:488

約数の個数: 80

約数和(自身を含む): 58924800

約数和(自身を除く): 37011440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 109, 112, 140, 218, 280, 359, 436, 545, 560, 718, 763, 872, 1090, 1436, 1526, 1744, 1795, 2180, 2513, 2872, 3052, 3590, 3815, 4360, 5026, 5744, 6104, 7180, 7630, 8720, 10052, 12208, 12565, 14360, 15260, 20104, 25130, 28720, 30520, 39131, 40208, 50260, 61040, 78262, 100520, 156524, 195655, 201040, 273917, 313048, 391310, 547834, 626096, 782620, 1095668, 1369585, 1565240, 2191336, 2739170, 3130480, 4382672, 5478340, 10956680, 21913360]

約数ペア:

[(1, 21913360), (2, 10956680), (4, 5478340), (5, 4382672), (7, 3130480), (8, 2739170), (10, 2191336), (14, 1565240), (16, 1369585), (20, 1095668), (28, 782620), (35, 626096), (40, 547834), (56, 391310), (70, 313048), (80, 273917), (109, 201040), (112, 195655), (140, 156524), (218, 100520), (280, 78262), (359, 61040), (436, 50260), (545, 40208), (560, 39131), (718, 30520), (763, 28720), (872, 25130), (1090, 20104), (1436, 15260), (1526, 14360), (1744, 12565), (1795, 12208), (2180, 10052), (2513, 8720), (2872, 7630), (3052, 7180), (3590, 6104), (3815, 5744), (4360, 5026)]