21980728

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2099}}^1$

素因数の和:2140

約数の個数: 64

約数和(自身を含む): 54432000

約数和(自身を除く): 32451272

約数列:

[1, 2, 4, 7, 8, 11, 14, 17, 22, 28, 34, 44, 56, 68, 77, 88, 119, 136, 154, 187, 238, 308, 374, 476, 616, 748, 952, 1309, 1496, 2099, 2618, 4198, 5236, 8396, 10472, 14693, 16792, 23089, 29386, 35683, 46178, 58772, 71366, 92356, 117544, 142732, 161623, 184712, 249781, 285464, 323246, 392513, 499562, 646492, 785026, 999124, 1292984, 1570052, 1998248, 2747591, 3140104, 5495182, 10990364, 21980728]

約数ペア:

[(1, 21980728), (2, 10990364), (4, 5495182), (7, 3140104), (8, 2747591), (11, 1998248), (14, 1570052), (17, 1292984), (22, 999124), (28, 785026), (34, 646492), (44, 499562), (56, 392513), (68, 323246), (77, 285464), (88, 249781), (119, 184712), (136, 161623), (154, 142732), (187, 117544), (238, 92356), (308, 71366), (374, 58772), (476, 46178), (616, 35683), (748, 29386), (952, 23089), (1309, 16792), (1496, 14693), (2099, 10472), (2618, 8396), (4198, 5236)]