21263970

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7789}}^1$

素因数の和:7819

約数の個数: 64

約数和(自身を含む): 62818560

約数和(自身を除く): 41554590

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 30, 35, 39, 42, 65, 70, 78, 91, 105, 130, 182, 195, 210, 273, 390, 455, 546, 910, 1365, 2730, 7789, 15578, 23367, 38945, 46734, 54523, 77890, 101257, 109046, 116835, 163569, 202514, 233670, 272615, 303771, 327138, 506285, 545230, 607542, 708799, 817845, 1012570, 1417598, 1518855, 1635690, 2126397, 3037710, 3543995, 4252794, 7087990, 10631985, 21263970]

約数ペア:

[(1, 21263970), (2, 10631985), (3, 7087990), (5, 4252794), (6, 3543995), (7, 3037710), (10, 2126397), (13, 1635690), (14, 1518855), (15, 1417598), (21, 1012570), (26, 817845), (30, 708799), (35, 607542), (39, 545230), (42, 506285), (65, 327138), (70, 303771), (78, 272615), (91, 233670), (105, 202514), (130, 163569), (182, 116835), (195, 109046), (210, 101257), (273, 77890), (390, 54523), (455, 46734), (546, 38945), (910, 23367), (1365, 15578), (2730, 7789)]