21191384

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:240

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 24168616

約数列:

[1, 2, 4, 8, 17, 19, 34, 38, 59, 68, 76, 118, 136, 139, 152, 236, 278, 323, 472, 556, 646, 1003, 1112, 1121, 1292, 2006, 2242, 2363, 2584, 2641, 4012, 4484, 4726, 5282, 8024, 8201, 8968, 9452, 10564, 16402, 18904, 19057, 21128, 32804, 38114, 44897, 65608, 76228, 89794, 139417, 152456, 155819, 179588, 278834, 311638, 359176, 557668, 623276, 1115336, 1246552, 2648923, 5297846, 10595692, 21191384]

約数ペア:

[(1, 21191384), (2, 10595692), (4, 5297846), (8, 2648923), (17, 1246552), (19, 1115336), (34, 623276), (38, 557668), (59, 359176), (68, 311638), (76, 278834), (118, 179588), (136, 155819), (139, 152456), (152, 139417), (236, 89794), (278, 76228), (323, 65608), (472, 44897), (556, 38114), (646, 32804), (1003, 21128), (1112, 19057), (1121, 18904), (1292, 16402), (2006, 10564), (2242, 9452), (2363, 8968), (2584, 8201), (2641, 8024), (4012, 5282), (4484, 4726)]