21220240

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1$

素因数の和:224

約数の個数: 80

約数和(自身を含む): 51907392

約数和(自身を除く): 30687152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 67, 74, 80, 107, 134, 148, 185, 214, 268, 296, 335, 370, 428, 535, 536, 592, 670, 740, 856, 1070, 1072, 1340, 1480, 1712, 2140, 2479, 2680, 2960, 3959, 4280, 4958, 5360, 7169, 7918, 8560, 9916, 12395, 14338, 15836, 19795, 19832, 24790, 28676, 31672, 35845, 39590, 39664, 49580, 57352, 63344, 71690, 79180, 99160, 114704, 143380, 158360, 198320, 265253, 286760, 316720, 530506, 573520, 1061012, 1326265, 2122024, 2652530, 4244048, 5305060, 10610120, 21220240]

約数ペア:

[(1, 21220240), (2, 10610120), (4, 5305060), (5, 4244048), (8, 2652530), (10, 2122024), (16, 1326265), (20, 1061012), (37, 573520), (40, 530506), (67, 316720), (74, 286760), (80, 265253), (107, 198320), (134, 158360), (148, 143380), (185, 114704), (214, 99160), (268, 79180), (296, 71690), (335, 63344), (370, 57352), (428, 49580), (535, 39664), (536, 39590), (592, 35845), (670, 31672), (740, 28676), (856, 24790), (1070, 19832), (1072, 19795), (1340, 15836), (1480, 14338), (1712, 12395), (2140, 9916), (2479, 8560), (2680, 7918), (2960, 7169), (3959, 5360), (4280, 4958)]