21940828

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:219

約数の個数: 72

約数和(自身を含む): 49156800

約数和(自身を除く): 27215972

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 79, 91, 98, 109, 158, 182, 196, 218, 316, 364, 436, 553, 637, 763, 1027, 1106, 1274, 1417, 1526, 2054, 2212, 2548, 2834, 3052, 3871, 4108, 5341, 5668, 7189, 7742, 8611, 9919, 10682, 14378, 15484, 17222, 19838, 21364, 28756, 34444, 39676, 50323, 60277, 69433, 100646, 111943, 120554, 138866, 201292, 223886, 241108, 277732, 421939, 447772, 783601, 843878, 1567202, 1687756, 3134404, 5485207, 10970414, 21940828]

約数ペア:

[(1, 21940828), (2, 10970414), (4, 5485207), (7, 3134404), (13, 1687756), (14, 1567202), (26, 843878), (28, 783601), (49, 447772), (52, 421939), (79, 277732), (91, 241108), (98, 223886), (109, 201292), (158, 138866), (182, 120554), (196, 111943), (218, 100646), (316, 69433), (364, 60277), (436, 50323), (553, 39676), (637, 34444), (763, 28756), (1027, 21364), (1106, 19838), (1274, 17222), (1417, 15484), (1526, 14378), (2054, 10682), (2212, 9919), (2548, 8611), (2834, 7742), (3052, 7189), (3871, 5668), (4108, 5341)]