21745815

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{179}}^1$

素因数の和:296

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 21799785

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 89, 91, 105, 179, 195, 267, 273, 445, 455, 537, 623, 895, 1157, 1253, 1335, 1365, 1869, 2327, 2685, 3115, 3471, 3759, 5785, 6265, 6981, 8099, 9345, 11635, 15931, 16289, 17355, 18795, 24297, 34905, 40495, 47793, 48867, 79655, 81445, 111517, 121485, 207103, 238965, 244335, 334551, 557585, 621309, 1035515, 1449721, 1672755, 3106545, 4349163, 7248605, 21745815]

約数ペア:

[(1, 21745815), (3, 7248605), (5, 4349163), (7, 3106545), (13, 1672755), (15, 1449721), (21, 1035515), (35, 621309), (39, 557585), (65, 334551), (89, 244335), (91, 238965), (105, 207103), (179, 121485), (195, 111517), (267, 81445), (273, 79655), (445, 48867), (455, 47793), (537, 40495), (623, 34905), (895, 24297), (1157, 18795), (1253, 17355), (1335, 16289), (1365, 15931), (1869, 11635), (2327, 9345), (2685, 8099), (3115, 6981), (3471, 6265), (3759, 5785)]