21399400

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:235

約数の個数: 96

約数和(自身を含む): 55442880

約数和(自身を除く): 34043480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 71, 88, 100, 110, 137, 142, 200, 220, 274, 275, 284, 355, 440, 548, 550, 568, 685, 710, 781, 1096, 1100, 1370, 1420, 1507, 1562, 1775, 2200, 2740, 2840, 3014, 3124, 3425, 3550, 3905, 5480, 6028, 6248, 6850, 7100, 7535, 7810, 9727, 12056, 13700, 14200, 15070, 15620, 19454, 19525, 27400, 30140, 31240, 37675, 38908, 39050, 48635, 60280, 75350, 77816, 78100, 97270, 106997, 150700, 156200, 194540, 213994, 243175, 301400, 389080, 427988, 486350, 534985, 855976, 972700, 1069970, 1945400, 2139940, 2674925, 4279880, 5349850, 10699700, 21399400]

約数ペア:

[(1, 21399400), (2, 10699700), (4, 5349850), (5, 4279880), (8, 2674925), (10, 2139940), (11, 1945400), (20, 1069970), (22, 972700), (25, 855976), (40, 534985), (44, 486350), (50, 427988), (55, 389080), (71, 301400), (88, 243175), (100, 213994), (110, 194540), (137, 156200), (142, 150700), (200, 106997), (220, 97270), (274, 78100), (275, 77816), (284, 75350), (355, 60280), (440, 48635), (548, 39050), (550, 38908), (568, 37675), (685, 31240), (710, 30140), (781, 27400), (1096, 19525), (1100, 19454), (1370, 15620), (1420, 15070), (1507, 14200), (1562, 13700), (1775, 12056), (2200, 9727), (2740, 7810), (2840, 7535), (3014, 7100), (3124, 6850), (3425, 6248), (3550, 6028), (3905, 5480)]