21321800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:247

約数の個数: 96

約数和(自身を含む): 54163200

約数和(自身を除く): 32841400

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 31, 38, 40, 50, 62, 76, 95, 100, 124, 152, 155, 181, 190, 200, 248, 310, 362, 380, 475, 589, 620, 724, 760, 775, 905, 950, 1178, 1240, 1448, 1550, 1810, 1900, 2356, 2945, 3100, 3439, 3620, 3800, 4525, 4712, 5611, 5890, 6200, 6878, 7240, 9050, 11222, 11780, 13756, 14725, 17195, 18100, 22444, 23560, 27512, 28055, 29450, 34390, 36200, 44888, 56110, 58900, 68780, 85975, 106609, 112220, 117800, 137560, 140275, 171950, 213218, 224440, 280550, 343900, 426436, 533045, 561100, 687800, 852872, 1066090, 1122200, 2132180, 2665225, 4264360, 5330450, 10660900, 21321800]

約数ペア:

[(1, 21321800), (2, 10660900), (4, 5330450), (5, 4264360), (8, 2665225), (10, 2132180), (19, 1122200), (20, 1066090), (25, 852872), (31, 687800), (38, 561100), (40, 533045), (50, 426436), (62, 343900), (76, 280550), (95, 224440), (100, 213218), (124, 171950), (152, 140275), (155, 137560), (181, 117800), (190, 112220), (200, 106609), (248, 85975), (310, 68780), (362, 58900), (380, 56110), (475, 44888), (589, 36200), (620, 34390), (724, 29450), (760, 28055), (775, 27512), (905, 23560), (950, 22444), (1178, 18100), (1240, 17195), (1448, 14725), (1550, 13756), (1810, 11780), (1900, 11222), (2356, 9050), (2945, 7240), (3100, 6878), (3439, 6200), (3620, 5890), (3800, 5611), (4525, 4712)]