21788190

素因数分解:

$2^1\times 3^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{727}}^1$

素因数の和:783

約数の個数: 80

約数和(自身を含む): 60252192

約数和(自身を除く): 38464002

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 37, 45, 54, 74, 81, 90, 111, 135, 162, 185, 222, 270, 333, 370, 405, 555, 666, 727, 810, 999, 1110, 1454, 1665, 1998, 2181, 2997, 3330, 3635, 4362, 4995, 5994, 6543, 7270, 9990, 10905, 13086, 14985, 19629, 21810, 26899, 29970, 32715, 39258, 53798, 58887, 65430, 80697, 98145, 117774, 134495, 161394, 196290, 242091, 268990, 294435, 403485, 484182, 588870, 726273, 806970, 1210455, 1452546, 2178819, 2420910, 3631365, 4357638, 7262730, 10894095, 21788190]

約数ペア:

[(1, 21788190), (2, 10894095), (3, 7262730), (5, 4357638), (6, 3631365), (9, 2420910), (10, 2178819), (15, 1452546), (18, 1210455), (27, 806970), (30, 726273), (37, 588870), (45, 484182), (54, 403485), (74, 294435), (81, 268990), (90, 242091), (111, 196290), (135, 161394), (162, 134495), (185, 117774), (222, 98145), (270, 80697), (333, 65430), (370, 58887), (405, 53798), (555, 39258), (666, 32715), (727, 29970), (810, 26899), (999, 21810), (1110, 19629), (1454, 14985), (1665, 13086), (1998, 10905), (2181, 9990), (2997, 7270), (3330, 6543), (3635, 5994), (4362, 4995)]