21921535

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 29304000

約数和(自身を除く): 7382465

約数列:

[1, 5, 19, 29, 73, 95, 109, 145, 365, 545, 551, 1387, 2071, 2117, 2755, 3161, 6935, 7957, 10355, 10585, 15805, 39785, 40223, 60059, 151183, 201115, 230753, 300295, 755915, 1153765, 4384307, 21921535]

約数ペア:

[(1, 21921535), (5, 4384307), (19, 1153765), (29, 755915), (73, 300295), (95, 230753), (109, 201115), (145, 151183), (365, 60059), (545, 40223), (551, 39785), (1387, 15805), (2071, 10585), (2117, 10355), (2755, 7957), (3161, 6935)]