21790965

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:202

約数の個数: 64

約数和(自身を含む): 42024960

約数和(自身を除く): 20233995

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 71, 79, 105, 111, 185, 213, 237, 259, 355, 395, 497, 553, 555, 777, 1065, 1185, 1295, 1491, 1659, 2485, 2627, 2765, 2923, 3885, 5609, 7455, 7881, 8295, 8769, 13135, 14615, 16827, 18389, 20461, 28045, 39263, 39405, 43845, 55167, 61383, 84135, 91945, 102305, 117789, 196315, 207533, 275835, 306915, 588945, 622599, 1037665, 1452731, 3112995, 4358193, 7263655, 21790965]

約数ペア:

[(1, 21790965), (3, 7263655), (5, 4358193), (7, 3112995), (15, 1452731), (21, 1037665), (35, 622599), (37, 588945), (71, 306915), (79, 275835), (105, 207533), (111, 196315), (185, 117789), (213, 102305), (237, 91945), (259, 84135), (355, 61383), (395, 55167), (497, 43845), (553, 39405), (555, 39263), (777, 28045), (1065, 20461), (1185, 18389), (1295, 16827), (1491, 14615), (1659, 13135), (2485, 8769), (2627, 8295), (2765, 7881), (2923, 7455), (3885, 5609)]