20180979

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{601}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 36813504

約数和(自身を除く): 16632525

約数列:

[1, 3, 7, 9, 13, 21, 39, 41, 63, 91, 117, 123, 273, 287, 369, 533, 601, 819, 861, 1599, 1803, 2583, 3731, 4207, 4797, 5409, 7813, 11193, 12621, 23439, 24641, 33579, 37863, 54691, 70317, 73923, 164073, 172487, 221769, 320333, 492219, 517461, 960999, 1552383, 2242331, 2882997, 6726993, 20180979]

約数ペア:

[(1, 20180979), (3, 6726993), (7, 2882997), (9, 2242331), (13, 1552383), (21, 960999), (39, 517461), (41, 492219), (63, 320333), (91, 221769), (117, 172487), (123, 164073), (273, 73923), (287, 70317), (369, 54691), (533, 37863), (601, 33579), (819, 24641), (861, 23439), (1599, 12621), (1803, 11193), (2583, 7813), (3731, 5409), (4207, 4797)]