21278508728

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{313}}^1\times {\mathrm{26309}}^1$

素因数の和:26664

約数の個数: 64

約数和(自身を含む): 44611236000

約数和(自身を除く): 23332727272

約数列:

[1, 2, 4, 8, 17, 19, 34, 38, 68, 76, 136, 152, 313, 323, 626, 646, 1252, 1292, 2504, 2584, 5321, 5947, 10642, 11894, 21284, 23788, 26309, 42568, 47576, 52618, 101099, 105236, 202198, 210472, 404396, 447253, 499871, 808792, 894506, 999742, 1789012, 1999484, 3578024, 3998968, 8234717, 8497807, 16469434, 16995614, 32938868, 33991228, 65877736, 67982456, 139990189, 156459623, 279980378, 312919246, 559960756, 625838492, 1119921512, 1251676984, 2659813591, 5319627182, 10639254364, 21278508728]

約数ペア:

[(1, 21278508728), (2, 10639254364), (4, 5319627182), (8, 2659813591), (17, 1251676984), (19, 1119921512), (34, 625838492), (38, 559960756), (68, 312919246), (76, 279980378), (136, 156459623), (152, 139990189), (313, 67982456), (323, 65877736), (626, 33991228), (646, 32938868), (1252, 16995614), (1292, 16469434), (2504, 8497807), (2584, 8234717), (5321, 3998968), (5947, 3578024), (10642, 1999484), (11894, 1789012), (21284, 999742), (23788, 894506), (26309, 808792), (42568, 499871), (47576, 447253), (52618, 404396), (101099, 210472), (105236, 202198)]