20209888900

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{257}}^1\times {\mathrm{25367}}^1$

素因数の和:25669

約数の個数: 72

約数和(自身を含む): 45448091136

約数和(自身を除く): 25238202236

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 155, 257, 310, 514, 620, 775, 1028, 1285, 1550, 2570, 3100, 5140, 6425, 7967, 12850, 15934, 25367, 25700, 31868, 39835, 50734, 79670, 101468, 126835, 159340, 199175, 253670, 398350, 507340, 634175, 786377, 796700, 1268350, 1572754, 2536700, 3145508, 3931885, 6519319, 7863770, 13038638, 15727540, 19659425, 26077276, 32596595, 39318850, 65193190, 78637700, 130386380, 162982975, 202098889, 325965950, 404197778, 651931900, 808395556, 1010494445, 2020988890, 4041977780, 5052472225, 10104944450, 20209888900]

約数ペア:

[(1, 20209888900), (2, 10104944450), (4, 5052472225), (5, 4041977780), (10, 2020988890), (20, 1010494445), (25, 808395556), (31, 651931900), (50, 404197778), (62, 325965950), (100, 202098889), (124, 162982975), (155, 130386380), (257, 78637700), (310, 65193190), (514, 39318850), (620, 32596595), (775, 26077276), (1028, 19659425), (1285, 15727540), (1550, 13038638), (2570, 7863770), (3100, 6519319), (5140, 3931885), (6425, 3145508), (7967, 2536700), (12850, 1572754), (15934, 1268350), (25367, 796700), (25700, 786377), (31868, 634175), (39835, 507340), (50734, 398350), (79670, 253670), (101468, 199175), (126835, 159340)]