21008470

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:253

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 24610730

約数列:

[1, 2, 5, 7, 10, 14, 29, 35, 58, 70, 79, 131, 145, 158, 203, 262, 290, 395, 406, 553, 655, 790, 917, 1015, 1106, 1310, 1834, 2030, 2291, 2765, 3799, 4582, 4585, 5530, 7598, 9170, 10349, 11455, 16037, 18995, 20698, 22910, 26593, 32074, 37990, 51745, 53186, 72443, 80185, 103490, 132965, 144886, 160370, 265930, 300121, 362215, 600242, 724430, 1500605, 2100847, 3001210, 4201694, 10504235, 21008470]

約数ペア:

[(1, 21008470), (2, 10504235), (5, 4201694), (7, 3001210), (10, 2100847), (14, 1500605), (29, 724430), (35, 600242), (58, 362215), (70, 300121), (79, 265930), (131, 160370), (145, 144886), (158, 132965), (203, 103490), (262, 80185), (290, 72443), (395, 53186), (406, 51745), (553, 37990), (655, 32074), (790, 26593), (917, 22910), (1015, 20698), (1106, 18995), (1310, 16037), (1834, 11455), (2030, 10349), (2291, 9170), (2765, 7598), (3799, 5530), (4582, 4585)]