28016820

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{307}}^1$

素因数の和:351

約数の個数: 144

約数和(自身を含む): 94691520

約数和(自身を除く): 66674700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 39, 45, 52, 54, 60, 65, 78, 90, 108, 117, 130, 135, 156, 169, 180, 195, 234, 260, 270, 307, 338, 351, 390, 468, 507, 540, 585, 614, 676, 702, 780, 845, 921, 1014, 1170, 1228, 1404, 1521, 1535, 1690, 1755, 1842, 2028, 2340, 2535, 2763, 3042, 3070, 3380, 3510, 3684, 3991, 4563, 4605, 5070, 5526, 6084, 6140, 7020, 7605, 7982, 8289, 9126, 9210, 10140, 11052, 11973, 13815, 15210, 15964, 16578, 18252, 18420, 19955, 22815, 23946, 27630, 30420, 33156, 35919, 39910, 41445, 45630, 47892, 51883, 55260, 59865, 71838, 79820, 82890, 91260, 103766, 107757, 119730, 143676, 155649, 165780, 179595, 207532, 215514, 239460, 259415, 311298, 359190, 431028, 466947, 518830, 538785, 622596, 718380, 778245, 933894, 1037660, 1077570, 1400841, 1556490, 1867788, 2155140, 2334735, 2801682, 3112980, 4669470, 5603364, 7004205, 9338940, 14008410, 28016820]

約数ペア:

[(1, 28016820), (2, 14008410), (3, 9338940), (4, 7004205), (5, 5603364), (6, 4669470), (9, 3112980), (10, 2801682), (12, 2334735), (13, 2155140), (15, 1867788), (18, 1556490), (20, 1400841), (26, 1077570), (27, 1037660), (30, 933894), (36, 778245), (39, 718380), (45, 622596), (52, 538785), (54, 518830), (60, 466947), (65, 431028), (78, 359190), (90, 311298), (108, 259415), (117, 239460), (130, 215514), (135, 207532), (156, 179595), (169, 165780), (180, 155649), (195, 143676), (234, 119730), (260, 107757), (270, 103766), (307, 91260), (338, 82890), (351, 79820), (390, 71838), (468, 59865), (507, 55260), (540, 51883), (585, 47892), (614, 45630), (676, 41445), (702, 39910), (780, 35919), (845, 33156), (921, 30420), (1014, 27630), (1170, 23946), (1228, 22815), (1404, 19955), (1521, 18420), (1535, 18252), (1690, 16578), (1755, 15964), (1842, 15210), (2028, 13815), (2340, 11973), (2535, 11052), (2763, 10140), (3042, 9210), (3070, 9126), (3380, 8289), (3510, 7982), (3684, 7605), (3991, 7020), (4563, 6140), (4605, 6084), (5070, 5526)]