21317499

素因数分解:

$3^4\times 7^2\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:198

約数の個数: 60

約数和(自身を含む): 38236968

約数和(自身を除く): 16919469

約数列:

[1, 3, 7, 9, 21, 27, 41, 49, 63, 81, 123, 131, 147, 189, 287, 369, 393, 441, 567, 861, 917, 1107, 1179, 1323, 2009, 2583, 2751, 3321, 3537, 3969, 5371, 6027, 6419, 7749, 8253, 10611, 16113, 18081, 19257, 23247, 24759, 37597, 48339, 54243, 57771, 74277, 112791, 145017, 162729, 173313, 263179, 338373, 435051, 519939, 789537, 1015119, 2368611, 3045357, 7105833, 21317499]

約数ペア:

[(1, 21317499), (3, 7105833), (7, 3045357), (9, 2368611), (21, 1015119), (27, 789537), (41, 519939), (49, 435051), (63, 338373), (81, 263179), (123, 173313), (131, 162729), (147, 145017), (189, 112791), (287, 74277), (369, 57771), (393, 54243), (441, 48339), (567, 37597), (861, 24759), (917, 23247), (1107, 19257), (1179, 18081), (1323, 16113), (2009, 10611), (2583, 8253), (2751, 7749), (3321, 6419), (3537, 6027), (3969, 5371)]