21538244

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 48263040

約数和(自身を除く): 26724796

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 79, 91, 98, 107, 158, 182, 196, 214, 316, 364, 428, 553, 637, 749, 1027, 1106, 1274, 1391, 1498, 2054, 2212, 2548, 2782, 2996, 3871, 4108, 5243, 5564, 7189, 7742, 8453, 9737, 10486, 14378, 15484, 16906, 19474, 20972, 28756, 33812, 38948, 50323, 59171, 68159, 100646, 109889, 118342, 136318, 201292, 219778, 236684, 272636, 414197, 439556, 769223, 828394, 1538446, 1656788, 3076892, 5384561, 10769122, 21538244]

約数ペア:

[(1, 21538244), (2, 10769122), (4, 5384561), (7, 3076892), (13, 1656788), (14, 1538446), (26, 828394), (28, 769223), (49, 439556), (52, 414197), (79, 272636), (91, 236684), (98, 219778), (107, 201292), (158, 136318), (182, 118342), (196, 109889), (214, 100646), (316, 68159), (364, 59171), (428, 50323), (553, 38948), (637, 33812), (749, 28756), (1027, 20972), (1106, 19474), (1274, 16906), (1391, 15484), (1498, 14378), (2054, 10486), (2212, 9737), (2548, 8453), (2782, 7742), (2996, 7189), (3871, 5564), (4108, 5243)]