21671780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{107}}^1$

素因数の和:189

約数の個数: 96

約数和(自身を含む): 53343360

約数和(自身を除く): 31671580

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 41, 52, 65, 76, 82, 95, 107, 130, 164, 190, 205, 214, 247, 260, 380, 410, 428, 494, 533, 535, 779, 820, 988, 1066, 1070, 1235, 1391, 1558, 2033, 2132, 2140, 2470, 2665, 2782, 3116, 3895, 4066, 4387, 4940, 5330, 5564, 6955, 7790, 8132, 8774, 10127, 10165, 10660, 13910, 15580, 17548, 20254, 20330, 21935, 26429, 27820, 40508, 40660, 43870, 50635, 52858, 57031, 83353, 87740, 101270, 105716, 114062, 132145, 166706, 202540, 228124, 264290, 285155, 333412, 416765, 528580, 570310, 833530, 1083589, 1140620, 1667060, 2167178, 4334356, 5417945, 10835890, 21671780]

約数ペア:

[(1, 21671780), (2, 10835890), (4, 5417945), (5, 4334356), (10, 2167178), (13, 1667060), (19, 1140620), (20, 1083589), (26, 833530), (38, 570310), (41, 528580), (52, 416765), (65, 333412), (76, 285155), (82, 264290), (95, 228124), (107, 202540), (130, 166706), (164, 132145), (190, 114062), (205, 105716), (214, 101270), (247, 87740), (260, 83353), (380, 57031), (410, 52858), (428, 50635), (494, 43870), (533, 40660), (535, 40508), (779, 27820), (820, 26429), (988, 21935), (1066, 20330), (1070, 20254), (1235, 17548), (1391, 15580), (1558, 13910), (2033, 10660), (2132, 10165), (2140, 10127), (2470, 8774), (2665, 8132), (2782, 7790), (3116, 6955), (3895, 5564), (4066, 5330), (4387, 4940)]