20428100

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{379}}^1$

素因数の和:418

約数の個数: 108

約数和(自身を含む): 56402640

約数和(自身を除く): 35974540

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 49, 50, 55, 70, 77, 98, 100, 110, 140, 154, 175, 196, 220, 245, 275, 308, 350, 379, 385, 490, 539, 550, 700, 758, 770, 980, 1078, 1100, 1225, 1516, 1540, 1895, 1925, 2156, 2450, 2653, 2695, 3790, 3850, 4169, 4900, 5306, 5390, 7580, 7700, 8338, 9475, 10612, 10780, 13265, 13475, 16676, 18571, 18950, 20845, 26530, 26950, 29183, 37142, 37900, 41690, 53060, 53900, 58366, 66325, 74284, 83380, 92855, 104225, 116732, 132650, 145915, 185710, 204281, 208450, 265300, 291830, 371420, 408562, 416900, 464275, 583660, 729575, 817124, 928550, 1021405, 1459150, 1857100, 2042810, 2918300, 4085620, 5107025, 10214050, 20428100]

約数ペア:

[(1, 20428100), (2, 10214050), (4, 5107025), (5, 4085620), (7, 2918300), (10, 2042810), (11, 1857100), (14, 1459150), (20, 1021405), (22, 928550), (25, 817124), (28, 729575), (35, 583660), (44, 464275), (49, 416900), (50, 408562), (55, 371420), (70, 291830), (77, 265300), (98, 208450), (100, 204281), (110, 185710), (140, 145915), (154, 132650), (175, 116732), (196, 104225), (220, 92855), (245, 83380), (275, 74284), (308, 66325), (350, 58366), (379, 53900), (385, 53060), (490, 41690), (539, 37900), (550, 37142), (700, 29183), (758, 26950), (770, 26530), (980, 20845), (1078, 18950), (1100, 18571), (1225, 16676), (1516, 13475), (1540, 13265), (1895, 10780), (1925, 10612), (2156, 9475), (2450, 8338), (2653, 7700), (2695, 7580), (3790, 5390), (3850, 5306), (4169, 4900)]