21408390

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1873}}^1$

素因数の和:2013

約数の個数: 48

約数和(自身を含む): 56130048

約数和(自身を除く): 34721658

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 127, 254, 381, 635, 762, 1143, 1270, 1873, 1905, 2286, 3746, 3810, 5619, 5715, 9365, 11238, 11430, 16857, 18730, 28095, 33714, 56190, 84285, 168570, 237871, 475742, 713613, 1189355, 1427226, 2140839, 2378710, 3568065, 4281678, 7136130, 10704195, 21408390]

約数ペア:

[(1, 21408390), (2, 10704195), (3, 7136130), (5, 4281678), (6, 3568065), (9, 2378710), (10, 2140839), (15, 1427226), (18, 1189355), (30, 713613), (45, 475742), (90, 237871), (127, 168570), (254, 84285), (381, 56190), (635, 33714), (762, 28095), (1143, 18730), (1270, 16857), (1873, 11430), (1905, 11238), (2286, 9365), (3746, 5715), (3810, 5619)]