21678135

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{349}}^1$

素因数の和:499

約数の個数: 32

約数和(自身を含む): 35985600

約数和(自身を除く): 14307465

約数列:

[1, 3, 5, 15, 41, 101, 123, 205, 303, 349, 505, 615, 1047, 1515, 1745, 4141, 5235, 12423, 14309, 20705, 35249, 42927, 62115, 71545, 105747, 176245, 214635, 528735, 1445209, 4335627, 7226045, 21678135]

約数ペア:

[(1, 21678135), (3, 7226045), (5, 4335627), (15, 1445209), (41, 528735), (101, 214635), (123, 176245), (205, 105747), (303, 71545), (349, 62115), (505, 42927), (615, 35249), (1047, 20705), (1515, 14309), (1745, 12423), (4141, 5235)]