21306740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{509}}^1$

素因数の和:561

約数の個数: 96

約数和(自身を含む): 57576960

約数和(自身を除く): 36270220

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 23, 26, 28, 35, 46, 52, 65, 70, 91, 92, 115, 130, 140, 161, 182, 230, 260, 299, 322, 364, 455, 460, 509, 598, 644, 805, 910, 1018, 1196, 1495, 1610, 1820, 2036, 2093, 2545, 2990, 3220, 3563, 4186, 5090, 5980, 6617, 7126, 8372, 10180, 10465, 11707, 13234, 14252, 17815, 20930, 23414, 26468, 33085, 35630, 41860, 46319, 46828, 58535, 66170, 71260, 81949, 92638, 117070, 132340, 152191, 163898, 185276, 231595, 234140, 304382, 327796, 409745, 463190, 608764, 760955, 819490, 926380, 1065337, 1521910, 1638980, 2130674, 3043820, 4261348, 5326685, 10653370, 21306740]

約数ペア:

[(1, 21306740), (2, 10653370), (4, 5326685), (5, 4261348), (7, 3043820), (10, 2130674), (13, 1638980), (14, 1521910), (20, 1065337), (23, 926380), (26, 819490), (28, 760955), (35, 608764), (46, 463190), (52, 409745), (65, 327796), (70, 304382), (91, 234140), (92, 231595), (115, 185276), (130, 163898), (140, 152191), (161, 132340), (182, 117070), (230, 92638), (260, 81949), (299, 71260), (322, 66170), (364, 58535), (455, 46828), (460, 46319), (509, 41860), (598, 35630), (644, 33085), (805, 26468), (910, 23414), (1018, 20930), (1196, 17815), (1495, 14252), (1610, 13234), (1820, 11707), (2036, 10465), (2093, 10180), (2545, 8372), (2990, 7126), (3220, 6617), (3563, 5980), (4186, 5090)]