21479994

素因数分解:

$2^1\times 3^2\times {\mathrm{19}}^1\times {\mathrm{181}}^1\times {\mathrm{347}}^1$

素因数の和:555

約数の個数: 48

約数和(自身を含む): 49402080

約数和(自身を除く): 27922086

約数列:

[1, 2, 3, 6, 9, 18, 19, 38, 57, 114, 171, 181, 342, 347, 362, 543, 694, 1041, 1086, 1629, 2082, 3123, 3258, 3439, 6246, 6593, 6878, 10317, 13186, 19779, 20634, 30951, 39558, 59337, 61902, 62807, 118674, 125614, 188421, 376842, 565263, 1130526, 1193333, 2386666, 3579999, 7159998, 10739997, 21479994]

約数ペア:

[(1, 21479994), (2, 10739997), (3, 7159998), (6, 3579999), (9, 2386666), (18, 1193333), (19, 1130526), (38, 565263), (57, 376842), (114, 188421), (171, 125614), (181, 118674), (342, 62807), (347, 61902), (362, 59337), (543, 39558), (694, 30951), (1041, 20634), (1086, 19779), (1629, 13186), (2082, 10317), (3123, 6878), (3258, 6593), (3439, 6246)]