19780425

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{661}}^1$

素因数の和:703

約数の個数: 72

約数和(自身を含む): 42685760

約数和(自身を除く): 22905335

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 25, 35, 45, 57, 63, 75, 95, 105, 133, 171, 175, 225, 285, 315, 399, 475, 525, 661, 665, 855, 1197, 1425, 1575, 1983, 1995, 3305, 3325, 4275, 4627, 5949, 5985, 9915, 9975, 12559, 13881, 16525, 23135, 29745, 29925, 37677, 41643, 49575, 62795, 69405, 87913, 113031, 115675, 148725, 188385, 208215, 263739, 313975, 347025, 439565, 565155, 791217, 941925, 1041075, 1318695, 2197825, 2825775, 3956085, 6593475, 19780425]

約数ペア:

[(1, 19780425), (3, 6593475), (5, 3956085), (7, 2825775), (9, 2197825), (15, 1318695), (19, 1041075), (21, 941925), (25, 791217), (35, 565155), (45, 439565), (57, 347025), (63, 313975), (75, 263739), (95, 208215), (105, 188385), (133, 148725), (171, 115675), (175, 113031), (225, 87913), (285, 69405), (315, 62795), (399, 49575), (475, 41643), (525, 37677), (661, 29925), (665, 29745), (855, 23135), (1197, 16525), (1425, 13881), (1575, 12559), (1983, 9975), (1995, 9915), (3305, 5985), (3325, 5949), (4275, 4627)]