21198840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1$

素因数の和:261

約数の個数: 128

約数和(自身を含む): 69672960

約数和(自身を除く): 48474120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 107, 120, 127, 130, 156, 195, 214, 254, 260, 312, 321, 381, 390, 428, 508, 520, 535, 635, 642, 762, 780, 856, 1016, 1070, 1270, 1284, 1391, 1524, 1560, 1605, 1651, 1905, 2140, 2540, 2568, 2782, 3048, 3210, 3302, 3810, 4173, 4280, 4953, 5080, 5564, 6420, 6604, 6955, 7620, 8255, 8346, 9906, 11128, 12840, 13208, 13589, 13910, 15240, 16510, 16692, 19812, 20865, 24765, 27178, 27820, 33020, 33384, 39624, 40767, 41730, 49530, 54356, 55640, 66040, 67945, 81534, 83460, 99060, 108712, 135890, 163068, 166920, 176657, 198120, 203835, 271780, 326136, 353314, 407670, 529971, 543560, 706628, 815340, 883285, 1059942, 1413256, 1630680, 1766570, 2119884, 2649855, 3533140, 4239768, 5299710, 7066280, 10599420, 21198840]

約数ペア:

[(1, 21198840), (2, 10599420), (3, 7066280), (4, 5299710), (5, 4239768), (6, 3533140), (8, 2649855), (10, 2119884), (12, 1766570), (13, 1630680), (15, 1413256), (20, 1059942), (24, 883285), (26, 815340), (30, 706628), (39, 543560), (40, 529971), (52, 407670), (60, 353314), (65, 326136), (78, 271780), (104, 203835), (107, 198120), (120, 176657), (127, 166920), (130, 163068), (156, 135890), (195, 108712), (214, 99060), (254, 83460), (260, 81534), (312, 67945), (321, 66040), (381, 55640), (390, 54356), (428, 49530), (508, 41730), (520, 40767), (535, 39624), (635, 33384), (642, 33020), (762, 27820), (780, 27178), (856, 24765), (1016, 20865), (1070, 19812), (1270, 16692), (1284, 16510), (1391, 15240), (1524, 13910), (1560, 13589), (1605, 13208), (1651, 12840), (1905, 11128), (2140, 9906), (2540, 8346), (2568, 8255), (2782, 7620), (3048, 6955), (3210, 6604), (3302, 6420), (3810, 5564), (4173, 5080), (4280, 4953)]