19971900

素因数分解:

$2^2\times 3^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{569}}^1$

素因数の和:605

約数の個数: 144

約数和(自身を含む): 69266400

約数和(自身を除く): 49294500

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 25, 26, 27, 30, 36, 39, 45, 50, 52, 54, 60, 65, 75, 78, 90, 100, 108, 117, 130, 135, 150, 156, 180, 195, 225, 234, 260, 270, 300, 325, 351, 390, 450, 468, 540, 569, 585, 650, 675, 702, 780, 900, 975, 1138, 1170, 1300, 1350, 1404, 1707, 1755, 1950, 2276, 2340, 2700, 2845, 2925, 3414, 3510, 3900, 5121, 5690, 5850, 6828, 7020, 7397, 8535, 8775, 10242, 11380, 11700, 14225, 14794, 15363, 17070, 17550, 20484, 22191, 25605, 28450, 29588, 30726, 34140, 35100, 36985, 42675, 44382, 51210, 56900, 61452, 66573, 73970, 76815, 85350, 88764, 102420, 110955, 128025, 133146, 147940, 153630, 170700, 184925, 199719, 221910, 256050, 266292, 307260, 332865, 369850, 384075, 399438, 443820, 512100, 554775, 665730, 739700, 768150, 798876, 998595, 1109550, 1331460, 1536300, 1664325, 1997190, 2219100, 3328650, 3994380, 4992975, 6657300, 9985950, 19971900]

約数ペア:

[(1, 19971900), (2, 9985950), (3, 6657300), (4, 4992975), (5, 3994380), (6, 3328650), (9, 2219100), (10, 1997190), (12, 1664325), (13, 1536300), (15, 1331460), (18, 1109550), (20, 998595), (25, 798876), (26, 768150), (27, 739700), (30, 665730), (36, 554775), (39, 512100), (45, 443820), (50, 399438), (52, 384075), (54, 369850), (60, 332865), (65, 307260), (75, 266292), (78, 256050), (90, 221910), (100, 199719), (108, 184925), (117, 170700), (130, 153630), (135, 147940), (150, 133146), (156, 128025), (180, 110955), (195, 102420), (225, 88764), (234, 85350), (260, 76815), (270, 73970), (300, 66573), (325, 61452), (351, 56900), (390, 51210), (450, 44382), (468, 42675), (540, 36985), (569, 35100), (585, 34140), (650, 30726), (675, 29588), (702, 28450), (780, 25605), (900, 22191), (975, 20484), (1138, 17550), (1170, 17070), (1300, 15363), (1350, 14794), (1404, 14225), (1707, 11700), (1755, 11380), (1950, 10242), (2276, 8775), (2340, 8535), (2700, 7397), (2845, 7020), (2925, 6828), (3414, 5850), (3510, 5690), (3900, 5121)]