21309720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{571}}^1$

素因数の和:896

約数の個数: 64

約数和(自身を含む): 64247040

約数和(自身を除く): 42937320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 311, 571, 622, 933, 1142, 1244, 1555, 1713, 1866, 2284, 2488, 2855, 3110, 3426, 3732, 4568, 4665, 5710, 6220, 6852, 7464, 8565, 9330, 11420, 12440, 13704, 17130, 18660, 22840, 34260, 37320, 68520, 177581, 355162, 532743, 710324, 887905, 1065486, 1420648, 1775810, 2130972, 2663715, 3551620, 4261944, 5327430, 7103240, 10654860, 21309720]

約数ペア:

[(1, 21309720), (2, 10654860), (3, 7103240), (4, 5327430), (5, 4261944), (6, 3551620), (8, 2663715), (10, 2130972), (12, 1775810), (15, 1420648), (20, 1065486), (24, 887905), (30, 710324), (40, 532743), (60, 355162), (120, 177581), (311, 68520), (571, 37320), (622, 34260), (933, 22840), (1142, 18660), (1244, 17130), (1555, 13704), (1713, 12440), (1866, 11420), (2284, 9330), (2488, 8565), (2855, 7464), (3110, 6852), (3426, 6220), (3732, 5710), (4568, 4665)]