21245648

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4111}}^1$

素因数の和:4155

約数の個数: 40

約数和(自身を含む): 45889920

約数和(自身を除く): 24644272

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 68, 76, 136, 152, 272, 304, 323, 646, 1292, 2584, 4111, 5168, 8222, 16444, 32888, 65776, 69887, 78109, 139774, 156218, 279548, 312436, 559096, 624872, 1118192, 1249744, 1327853, 2655706, 5311412, 10622824, 21245648]

約数ペア:

[(1, 21245648), (2, 10622824), (4, 5311412), (8, 2655706), (16, 1327853), (17, 1249744), (19, 1118192), (34, 624872), (38, 559096), (68, 312436), (76, 279548), (136, 156218), (152, 139774), (272, 78109), (304, 69887), (323, 65776), (646, 32888), (1292, 16444), (2584, 8222), (4111, 5168)]