21293860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1$

素因数の和:445

約数の個数: 96

約数和(自身を含む): 56609280

約数和(自身を除く): 35315420

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 23, 28, 34, 35, 46, 68, 70, 85, 92, 115, 119, 140, 161, 170, 230, 238, 322, 340, 389, 391, 460, 476, 595, 644, 778, 782, 805, 1190, 1556, 1564, 1610, 1945, 1955, 2380, 2723, 2737, 3220, 3890, 3910, 5446, 5474, 6613, 7780, 7820, 8947, 10892, 10948, 13226, 13615, 13685, 17894, 26452, 27230, 27370, 33065, 35788, 44735, 46291, 54460, 54740, 62629, 66130, 89470, 92582, 125258, 132260, 152099, 178940, 185164, 231455, 250516, 304198, 313145, 462910, 608396, 626290, 760495, 925820, 1064693, 1252580, 1520990, 2129386, 3041980, 4258772, 5323465, 10646930, 21293860]

約数ペア:

[(1, 21293860), (2, 10646930), (4, 5323465), (5, 4258772), (7, 3041980), (10, 2129386), (14, 1520990), (17, 1252580), (20, 1064693), (23, 925820), (28, 760495), (34, 626290), (35, 608396), (46, 462910), (68, 313145), (70, 304198), (85, 250516), (92, 231455), (115, 185164), (119, 178940), (140, 152099), (161, 132260), (170, 125258), (230, 92582), (238, 89470), (322, 66130), (340, 62629), (389, 54740), (391, 54460), (460, 46291), (476, 44735), (595, 35788), (644, 33065), (778, 27370), (782, 27230), (805, 26452), (1190, 17894), (1556, 13685), (1564, 13615), (1610, 13226), (1945, 10948), (1955, 10892), (2380, 8947), (2723, 7820), (2737, 7780), (3220, 6613), (3890, 5474), (3910, 5446)]