21937419

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:225

約数の個数: 64

約数和(自身を含む): 40320000

約数和(自身を除く): 18382581

約数列:

[1, 3, 7, 9, 19, 21, 27, 41, 57, 63, 123, 133, 149, 171, 189, 287, 369, 399, 447, 513, 779, 861, 1043, 1107, 1197, 1341, 2337, 2583, 2831, 3129, 3591, 4023, 5453, 6109, 7011, 7749, 8493, 9387, 16359, 18327, 19817, 21033, 25479, 28161, 42763, 49077, 54981, 59451, 76437, 116071, 128289, 147231, 164943, 178353, 348213, 384867, 535059, 812497, 1044639, 1154601, 2437491, 3133917, 7312473, 21937419]

約数ペア:

[(1, 21937419), (3, 7312473), (7, 3133917), (9, 2437491), (19, 1154601), (21, 1044639), (27, 812497), (41, 535059), (57, 384867), (63, 348213), (123, 178353), (133, 164943), (149, 147231), (171, 128289), (189, 116071), (287, 76437), (369, 59451), (399, 54981), (447, 49077), (513, 42763), (779, 28161), (861, 25479), (1043, 21033), (1107, 19817), (1197, 18327), (1341, 16359), (2337, 9387), (2583, 8493), (2831, 7749), (3129, 7011), (3591, 6109), (4023, 5453)]