21708015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{2617}}^1$

素因数の和:2711

約数の個数: 32

約数和(自身を含む): 40212480

約数和(自身を除く): 18504465

約数列:

[1, 3, 5, 7, 15, 21, 35, 79, 105, 237, 395, 553, 1185, 1659, 2617, 2765, 7851, 8295, 13085, 18319, 39255, 54957, 91595, 206743, 274785, 620229, 1033715, 1447201, 3101145, 4341603, 7236005, 21708015]

約数ペア:

[(1, 21708015), (3, 7236005), (5, 4341603), (7, 3101145), (15, 1447201), (21, 1033715), (35, 620229), (79, 274785), (105, 206743), (237, 91595), (395, 54957), (553, 39255), (1185, 18319), (1659, 13085), (2617, 8295), (2765, 7851)]