20643766

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1$

素因数の和:205

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 19273034

約数列:

[1, 2, 11, 13, 19, 22, 26, 29, 38, 58, 131, 143, 209, 247, 262, 286, 319, 377, 418, 494, 551, 638, 754, 1102, 1441, 1703, 2489, 2717, 2882, 3406, 3799, 4147, 4978, 5434, 6061, 7163, 7598, 8294, 12122, 14326, 18733, 27379, 32357, 37466, 41789, 49387, 54758, 64714, 72181, 78793, 83578, 98774, 144362, 157586, 355927, 543257, 711854, 793991, 938353, 1086514, 1587982, 1876706, 10321883, 20643766]

約数ペア:

[(1, 20643766), (2, 10321883), (11, 1876706), (13, 1587982), (19, 1086514), (22, 938353), (26, 793991), (29, 711854), (38, 543257), (58, 355927), (131, 157586), (143, 144362), (209, 98774), (247, 83578), (262, 78793), (286, 72181), (319, 64714), (377, 54758), (418, 49387), (494, 41789), (551, 37466), (638, 32357), (754, 27379), (1102, 18733), (1441, 14326), (1703, 12122), (2489, 8294), (2717, 7598), (2882, 7163), (3406, 6061), (3799, 5434), (4147, 4978)]