21409180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1229}}^1$

素因数の和:1318

約数の個数: 48

約数和(自身を含む): 49180320

約数和(自身を除く): 27771140

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1229, 1340, 1742, 2458, 3484, 4355, 4916, 6145, 8710, 12290, 15977, 17420, 24580, 31954, 63908, 79885, 82343, 159770, 164686, 319540, 329372, 411715, 823430, 1070459, 1646860, 2140918, 4281836, 5352295, 10704590, 21409180]

約数ペア:

[(1, 21409180), (2, 10704590), (4, 5352295), (5, 4281836), (10, 2140918), (13, 1646860), (20, 1070459), (26, 823430), (52, 411715), (65, 329372), (67, 319540), (130, 164686), (134, 159770), (260, 82343), (268, 79885), (335, 63908), (670, 31954), (871, 24580), (1229, 17420), (1340, 15977), (1742, 12290), (2458, 8710), (3484, 6145), (4355, 4916)]