21816405

素因数分解:

$3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{401}}^1$

素因数の和:459

約数の個数: 64

約数和(自身を含む): 43223040

約数和(自身を除く): 21406635

約数列:

[1, 3, 5, 9, 13, 15, 27, 31, 39, 45, 65, 93, 117, 135, 155, 195, 279, 351, 401, 403, 465, 585, 837, 1203, 1209, 1395, 1755, 2005, 2015, 3609, 3627, 4185, 5213, 6015, 6045, 10827, 10881, 12431, 15639, 18045, 18135, 26065, 37293, 46917, 54135, 54405, 62155, 78195, 111879, 140751, 161603, 186465, 234585, 335637, 484809, 559395, 703755, 808015, 1454427, 1678185, 2424045, 4363281, 7272135, 21816405]

約数ペア:

[(1, 21816405), (3, 7272135), (5, 4363281), (9, 2424045), (13, 1678185), (15, 1454427), (27, 808015), (31, 703755), (39, 559395), (45, 484809), (65, 335637), (93, 234585), (117, 186465), (135, 161603), (155, 140751), (195, 111879), (279, 78195), (351, 62155), (401, 54405), (403, 54135), (465, 46917), (585, 37293), (837, 26065), (1203, 18135), (1209, 18045), (1395, 15639), (1755, 12431), (2005, 10881), (2015, 10827), (3609, 6045), (3627, 6015), (4185, 5213)]