21657430

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1\times {\mathrm{523}}^1$

素因数の和:672

約数の個数: 32

約数和(自身を含む): 40406688

約数和(自身を除く): 18749258

約数列:

[1, 2, 5, 10, 41, 82, 101, 202, 205, 410, 505, 523, 1010, 1046, 2615, 4141, 5230, 8282, 20705, 21443, 41410, 42886, 52823, 105646, 107215, 214430, 264115, 528230, 2165743, 4331486, 10828715, 21657430]

約数ペア:

[(1, 21657430), (2, 10828715), (5, 4331486), (10, 2165743), (41, 528230), (82, 264115), (101, 214430), (202, 107215), (205, 105646), (410, 52823), (505, 42886), (523, 41410), (1010, 21443), (1046, 20705), (2615, 8282), (4141, 5230)]