21916349

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{457}}^1$

素因数の和:525

約数の個数: 32

約数和(自身を含む): 29546496

約数和(自身を除く): 7630147

約数列:

[1, 7, 13, 17, 31, 91, 119, 217, 221, 403, 457, 527, 1547, 2821, 3199, 3689, 5941, 6851, 7769, 14167, 41587, 47957, 54383, 99169, 100997, 184171, 240839, 706979, 1289197, 1685873, 3130907, 21916349]

約数ペア:

[(1, 21916349), (7, 3130907), (13, 1685873), (17, 1289197), (31, 706979), (91, 240839), (119, 184171), (217, 100997), (221, 99169), (403, 54383), (457, 47957), (527, 41587), (1547, 14167), (2821, 7769), (3199, 6851), (3689, 5941)]