28257920

素因数分解:

$2^7\times 5^1\times {\mathrm{67}}^1\times {\mathrm{659}}^1$

素因数の和:745

約数の個数: 64

約数和(自身を含む): 68666400

約数和(自身を除く): 40408480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 128, 134, 160, 268, 320, 335, 536, 640, 659, 670, 1072, 1318, 1340, 2144, 2636, 2680, 3295, 4288, 5272, 5360, 6590, 8576, 10544, 10720, 13180, 21088, 21440, 26360, 42176, 42880, 44153, 52720, 84352, 88306, 105440, 176612, 210880, 220765, 353224, 421760, 441530, 706448, 883060, 1412896, 1766120, 2825792, 3532240, 5651584, 7064480, 14128960, 28257920]

約数ペア:

[(1, 28257920), (2, 14128960), (4, 7064480), (5, 5651584), (8, 3532240), (10, 2825792), (16, 1766120), (20, 1412896), (32, 883060), (40, 706448), (64, 441530), (67, 421760), (80, 353224), (128, 220765), (134, 210880), (160, 176612), (268, 105440), (320, 88306), (335, 84352), (536, 52720), (640, 44153), (659, 42880), (670, 42176), (1072, 26360), (1318, 21440), (1340, 21088), (2144, 13180), (2636, 10720), (2680, 10544), (3295, 8576), (4288, 6590), (5272, 5360)]