20985386

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:326

約数の個数: 32

約数和(自身を含む): 34776000

約数和(自身を除く): 13790614

約数列:

[1, 2, 19, 29, 38, 58, 137, 139, 274, 278, 551, 1102, 2603, 2641, 3973, 4031, 5206, 5282, 7946, 8062, 19043, 38086, 75487, 76589, 150974, 153178, 361817, 552247, 723634, 1104494, 10492693, 20985386]

約数ペア:

[(1, 20985386), (2, 10492693), (19, 1104494), (29, 723634), (38, 552247), (58, 361817), (137, 153178), (139, 150974), (274, 76589), (278, 75487), (551, 38086), (1102, 19043), (2603, 8062), (2641, 7946), (3973, 5282), (4031, 5206)]