21000209048

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^3\times {\mathrm{170689}}^1$

素因数の和:170741

約数の個数: 64

約数和(自身を含む): 48749064000

約数和(自身を除く): 27748854952

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 169, 182, 338, 364, 676, 728, 1183, 1352, 2197, 2366, 4394, 4732, 8788, 9464, 15379, 17576, 30758, 61516, 123032, 170689, 341378, 682756, 1194823, 1365512, 2218957, 2389646, 4437914, 4779292, 8875828, 9558584, 15532699, 17751656, 28846441, 31065398, 57692882, 62130796, 115385764, 124261592, 201925087, 230771528, 375003733, 403850174, 750007466, 807700348, 1500014932, 1615400696, 2625026131, 3000029864, 5250052262, 10500104524, 21000209048]

約数ペア:

[(1, 21000209048), (2, 10500104524), (4, 5250052262), (7, 3000029864), (8, 2625026131), (13, 1615400696), (14, 1500014932), (26, 807700348), (28, 750007466), (52, 403850174), (56, 375003733), (91, 230771528), (104, 201925087), (169, 124261592), (182, 115385764), (338, 62130796), (364, 57692882), (676, 31065398), (728, 28846441), (1183, 17751656), (1352, 15532699), (2197, 9558584), (2366, 8875828), (4394, 4779292), (4732, 4437914), (8788, 2389646), (9464, 2218957), (15379, 1365512), (17576, 1194823), (30758, 682756), (61516, 341378), (123032, 170689)]