21805236

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{449}}^1$

素因数の和:549

約数の個数: 72

約数和(自身を含む): 58968000

約数和(自身を除く): 37162764

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 71, 76, 114, 142, 171, 213, 228, 284, 342, 426, 449, 639, 684, 852, 898, 1278, 1347, 1349, 1796, 2556, 2694, 2698, 4041, 4047, 5388, 5396, 8082, 8094, 8531, 12141, 16164, 16188, 17062, 24282, 25593, 31879, 34124, 48564, 51186, 63758, 76779, 95637, 102372, 127516, 153558, 191274, 286911, 307116, 382548, 573822, 605701, 1147644, 1211402, 1817103, 2422804, 3634206, 5451309, 7268412, 10902618, 21805236]

約数ペア:

[(1, 21805236), (2, 10902618), (3, 7268412), (4, 5451309), (6, 3634206), (9, 2422804), (12, 1817103), (18, 1211402), (19, 1147644), (36, 605701), (38, 573822), (57, 382548), (71, 307116), (76, 286911), (114, 191274), (142, 153558), (171, 127516), (213, 102372), (228, 95637), (284, 76779), (342, 63758), (426, 51186), (449, 48564), (639, 34124), (684, 31879), (852, 25593), (898, 24282), (1278, 17062), (1347, 16188), (1349, 16164), (1796, 12141), (2556, 8531), (2694, 8094), (2698, 8082), (4041, 5396), (4047, 5388)]