21291258280

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{132047}}^1$

素因数の和:132226

約数の個数: 64

約数和(自身を含む): 49914144000

約数和(自身を除く): 28622885720

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 139, 145, 232, 278, 290, 556, 580, 695, 1112, 1160, 1390, 2780, 4031, 5560, 8062, 16124, 20155, 32248, 40310, 80620, 132047, 161240, 264094, 528188, 660235, 1056376, 1320470, 2640940, 3829363, 5281880, 7658726, 15317452, 18354533, 19146815, 30634904, 36709066, 38293630, 73418132, 76587260, 91772665, 146836264, 153174520, 183545330, 367090660, 532281457, 734181320, 1064562914, 2129125828, 2661407285, 4258251656, 5322814570, 10645629140, 21291258280]

約数ペア:

[(1, 21291258280), (2, 10645629140), (4, 5322814570), (5, 4258251656), (8, 2661407285), (10, 2129125828), (20, 1064562914), (29, 734181320), (40, 532281457), (58, 367090660), (116, 183545330), (139, 153174520), (145, 146836264), (232, 91772665), (278, 76587260), (290, 73418132), (556, 38293630), (580, 36709066), (695, 30634904), (1112, 19146815), (1160, 18354533), (1390, 15317452), (2780, 7658726), (4031, 5281880), (5560, 3829363), (8062, 2640940), (16124, 1320470), (20155, 1056376), (32248, 660235), (40310, 528188), (80620, 264094), (132047, 161240)]