21147868

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{149}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 44049600

約数和(自身を除く): 22901732

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 137, 148, 149, 259, 274, 298, 518, 548, 596, 959, 1036, 1043, 1918, 2086, 3836, 4172, 5069, 5513, 10138, 11026, 20276, 20413, 22052, 35483, 38591, 40826, 70966, 77182, 81652, 141932, 142891, 154364, 285782, 571564, 755281, 1510562, 3021124, 5286967, 10573934, 21147868]

約数ペア:

[(1, 21147868), (2, 10573934), (4, 5286967), (7, 3021124), (14, 1510562), (28, 755281), (37, 571564), (74, 285782), (137, 154364), (148, 142891), (149, 141932), (259, 81652), (274, 77182), (298, 70966), (518, 40826), (548, 38591), (596, 35483), (959, 22052), (1036, 20413), (1043, 20276), (1918, 11026), (2086, 10138), (3836, 5513), (4172, 5069)]