20215620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:314

約数の個数: 144

約数和(自身を含む): 67616640

約数和(自身を除く): 47401020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 19, 20, 23, 30, 36, 38, 45, 46, 57, 60, 69, 76, 90, 92, 95, 114, 115, 138, 171, 180, 190, 207, 228, 230, 257, 276, 285, 342, 345, 380, 414, 437, 460, 514, 570, 684, 690, 771, 828, 855, 874, 1028, 1035, 1140, 1285, 1311, 1380, 1542, 1710, 1748, 2070, 2185, 2313, 2570, 2622, 3084, 3420, 3855, 3933, 4140, 4370, 4626, 4883, 5140, 5244, 5911, 6555, 7710, 7866, 8740, 9252, 9766, 11565, 11822, 13110, 14649, 15420, 15732, 17733, 19532, 19665, 23130, 23644, 24415, 26220, 29298, 29555, 35466, 39330, 43947, 46260, 48830, 53199, 58596, 59110, 70932, 73245, 78660, 87894, 88665, 97660, 106398, 112309, 118220, 146490, 175788, 177330, 212796, 219735, 224618, 265995, 292980, 336927, 354660, 439470, 449236, 531990, 561545, 673854, 878940, 1010781, 1063980, 1123090, 1347708, 1684635, 2021562, 2246180, 3369270, 4043124, 5053905, 6738540, 10107810, 20215620]

約数ペア:

[(1, 20215620), (2, 10107810), (3, 6738540), (4, 5053905), (5, 4043124), (6, 3369270), (9, 2246180), (10, 2021562), (12, 1684635), (15, 1347708), (18, 1123090), (19, 1063980), (20, 1010781), (23, 878940), (30, 673854), (36, 561545), (38, 531990), (45, 449236), (46, 439470), (57, 354660), (60, 336927), (69, 292980), (76, 265995), (90, 224618), (92, 219735), (95, 212796), (114, 177330), (115, 175788), (138, 146490), (171, 118220), (180, 112309), (190, 106398), (207, 97660), (228, 88665), (230, 87894), (257, 78660), (276, 73245), (285, 70932), (342, 59110), (345, 58596), (380, 53199), (414, 48830), (437, 46260), (460, 43947), (514, 39330), (570, 35466), (684, 29555), (690, 29298), (771, 26220), (828, 24415), (855, 23644), (874, 23130), (1028, 19665), (1035, 19532), (1140, 17733), (1285, 15732), (1311, 15420), (1380, 14649), (1542, 13110), (1710, 11822), (1748, 11565), (2070, 9766), (2185, 9252), (2313, 8740), (2570, 7866), (2622, 7710), (3084, 6555), (3420, 5911), (3855, 5244), (3933, 5140), (4140, 4883), (4370, 4626)]