20215240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{397}}^1$

素因数の和:494

約数の個数: 64

約数和(自身を含む): 48715200

約数和(自身を除く): 28499960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 67, 76, 95, 134, 152, 190, 268, 335, 380, 397, 536, 670, 760, 794, 1273, 1340, 1588, 1985, 2546, 2680, 3176, 3970, 5092, 6365, 7543, 7940, 10184, 12730, 15086, 15880, 25460, 26599, 30172, 37715, 50920, 53198, 60344, 75430, 106396, 132995, 150860, 212792, 265990, 301720, 505381, 531980, 1010762, 1063960, 2021524, 2526905, 4043048, 5053810, 10107620, 20215240]

約数ペア:

[(1, 20215240), (2, 10107620), (4, 5053810), (5, 4043048), (8, 2526905), (10, 2021524), (19, 1063960), (20, 1010762), (38, 531980), (40, 505381), (67, 301720), (76, 265990), (95, 212792), (134, 150860), (152, 132995), (190, 106396), (268, 75430), (335, 60344), (380, 53198), (397, 50920), (536, 37715), (670, 30172), (760, 26599), (794, 25460), (1273, 15880), (1340, 15086), (1588, 12730), (1985, 10184), (2546, 7940), (2680, 7543), (3176, 6365), (3970, 5092)]