21361788

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{823}}^1$

素因数の和:943

約数の個数: 72

約数和(自身を含む): 62386688

約数和(自身を除く): 41024900

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 103, 126, 206, 252, 309, 412, 618, 721, 823, 927, 1236, 1442, 1646, 1854, 2163, 2469, 2884, 3292, 3708, 4326, 4938, 5761, 6489, 7407, 8652, 9876, 11522, 12978, 14814, 17283, 23044, 25956, 29628, 34566, 51849, 69132, 84769, 103698, 169538, 207396, 254307, 339076, 508614, 593383, 762921, 1017228, 1186766, 1525842, 1780149, 2373532, 3051684, 3560298, 5340447, 7120596, 10680894, 21361788]

約数ペア:

[(1, 21361788), (2, 10680894), (3, 7120596), (4, 5340447), (6, 3560298), (7, 3051684), (9, 2373532), (12, 1780149), (14, 1525842), (18, 1186766), (21, 1017228), (28, 762921), (36, 593383), (42, 508614), (63, 339076), (84, 254307), (103, 207396), (126, 169538), (206, 103698), (252, 84769), (309, 69132), (412, 51849), (618, 34566), (721, 29628), (823, 25956), (927, 23044), (1236, 17283), (1442, 14814), (1646, 12978), (1854, 11522), (2163, 9876), (2469, 8652), (2884, 7407), (3292, 6489), (3708, 5761), (4326, 4938)]