19907181

素因数分解:

$3^3\times 7^2\times {\mathrm{41}}^1\times {\mathrm{367}}^1$

素因数の和:431

約数の個数: 48

約数和(自身を含む): 35239680

約数和(自身を除く): 15332499

約数列:

[1, 3, 7, 9, 21, 27, 41, 49, 63, 123, 147, 189, 287, 367, 369, 441, 861, 1101, 1107, 1323, 2009, 2569, 2583, 3303, 6027, 7707, 7749, 9909, 15047, 17983, 18081, 23121, 45141, 53949, 54243, 69363, 105329, 135423, 161847, 315987, 406269, 485541, 737303, 947961, 2211909, 2843883, 6635727, 19907181]

約数ペア:

[(1, 19907181), (3, 6635727), (7, 2843883), (9, 2211909), (21, 947961), (27, 737303), (41, 485541), (49, 406269), (63, 315987), (123, 161847), (147, 135423), (189, 105329), (287, 69363), (367, 54243), (369, 53949), (441, 45141), (861, 23121), (1101, 18081), (1107, 17983), (1323, 15047), (2009, 9909), (2569, 7749), (2583, 7707), (3303, 6027)]