21350380

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1\times {\mathrm{281}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 46902240

約数和(自身を除く): 25551860

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 131, 145, 262, 281, 290, 524, 562, 580, 655, 1124, 1310, 1405, 2620, 2810, 3799, 5620, 7598, 8149, 15196, 16298, 18995, 32596, 36811, 37990, 40745, 73622, 75980, 81490, 147244, 162980, 184055, 368110, 736220, 1067519, 2135038, 4270076, 5337595, 10675190, 21350380]

約数ペア:

[(1, 21350380), (2, 10675190), (4, 5337595), (5, 4270076), (10, 2135038), (20, 1067519), (29, 736220), (58, 368110), (116, 184055), (131, 162980), (145, 147244), (262, 81490), (281, 75980), (290, 73622), (524, 40745), (562, 37990), (580, 36811), (655, 32596), (1124, 18995), (1310, 16298), (1405, 15196), (2620, 8149), (2810, 7598), (3799, 5620)]