21763820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:219

約数の個数: 72

約数和(自身を含む): 50912064

約数和(自身を除く): 29148244

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 47, 52, 65, 94, 130, 137, 169, 188, 235, 260, 274, 338, 470, 548, 611, 676, 685, 845, 940, 1222, 1370, 1690, 1781, 2444, 2740, 3055, 3380, 3562, 6110, 6439, 7124, 7943, 8905, 12220, 12878, 15886, 17810, 23153, 25756, 31772, 32195, 35620, 39715, 46306, 64390, 79430, 83707, 92612, 115765, 128780, 158860, 167414, 231530, 334828, 418535, 463060, 837070, 1088191, 1674140, 2176382, 4352764, 5440955, 10881910, 21763820]

約数ペア:

[(1, 21763820), (2, 10881910), (4, 5440955), (5, 4352764), (10, 2176382), (13, 1674140), (20, 1088191), (26, 837070), (47, 463060), (52, 418535), (65, 334828), (94, 231530), (130, 167414), (137, 158860), (169, 128780), (188, 115765), (235, 92612), (260, 83707), (274, 79430), (338, 64390), (470, 46306), (548, 39715), (611, 35620), (676, 32195), (685, 31772), (845, 25756), (940, 23153), (1222, 17810), (1370, 15886), (1690, 12878), (1781, 12220), (2444, 8905), (2740, 7943), (3055, 7124), (3380, 6439), (3562, 6110)]