21000887982

素因数分解:

$2^1\times 3^4\times {\mathrm{131}}^1\times {\mathrm{989581}}^1$

素因数の和:989726

約数の個数: 40

約数和(自身を含む): 47416811112

約数和(自身を除く): 26415923130

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 131, 162, 262, 393, 786, 1179, 2358, 3537, 7074, 10611, 21222, 989581, 1979162, 2968743, 5937486, 8906229, 17812458, 26718687, 53437374, 80156061, 129635111, 160312122, 259270222, 388905333, 777810666, 1166715999, 2333431998, 3500147997, 7000295994, 10500443991, 21000887982]

約数ペア:

[(1, 21000887982), (2, 10500443991), (3, 7000295994), (6, 3500147997), (9, 2333431998), (18, 1166715999), (27, 777810666), (54, 388905333), (81, 259270222), (131, 160312122), (162, 129635111), (262, 80156061), (393, 53437374), (786, 26718687), (1179, 17812458), (2358, 8906229), (3537, 5937486), (7074, 2968743), (10611, 1979162), (21222, 989581)]