21408660

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1307}}^1$

素因数の和:1342

約数の個数: 144

約数和(自身を含む): 79986816

約数和(自身を除く): 58578156

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 28, 30, 35, 36, 39, 42, 45, 52, 60, 63, 65, 70, 78, 84, 90, 91, 105, 117, 126, 130, 140, 156, 180, 182, 195, 210, 234, 252, 260, 273, 315, 364, 390, 420, 455, 468, 546, 585, 630, 780, 819, 910, 1092, 1170, 1260, 1307, 1365, 1638, 1820, 2340, 2614, 2730, 3276, 3921, 4095, 5228, 5460, 6535, 7842, 8190, 9149, 11763, 13070, 15684, 16380, 16991, 18298, 19605, 23526, 26140, 27447, 33982, 36596, 39210, 45745, 47052, 50973, 54894, 58815, 67964, 78420, 82341, 84955, 91490, 101946, 109788, 117630, 118937, 137235, 152919, 164682, 169910, 182980, 203892, 235260, 237874, 254865, 274470, 305838, 329364, 339820, 356811, 411705, 475748, 509730, 548940, 594685, 611676, 713622, 764595, 823410, 1019460, 1070433, 1189370, 1427244, 1529190, 1646820, 1784055, 2140866, 2378740, 3058380, 3568110, 4281732, 5352165, 7136220, 10704330, 21408660]

約数ペア:

[(1, 21408660), (2, 10704330), (3, 7136220), (4, 5352165), (5, 4281732), (6, 3568110), (7, 3058380), (9, 2378740), (10, 2140866), (12, 1784055), (13, 1646820), (14, 1529190), (15, 1427244), (18, 1189370), (20, 1070433), (21, 1019460), (26, 823410), (28, 764595), (30, 713622), (35, 611676), (36, 594685), (39, 548940), (42, 509730), (45, 475748), (52, 411705), (60, 356811), (63, 339820), (65, 329364), (70, 305838), (78, 274470), (84, 254865), (90, 237874), (91, 235260), (105, 203892), (117, 182980), (126, 169910), (130, 164682), (140, 152919), (156, 137235), (180, 118937), (182, 117630), (195, 109788), (210, 101946), (234, 91490), (252, 84955), (260, 82341), (273, 78420), (315, 67964), (364, 58815), (390, 54894), (420, 50973), (455, 47052), (468, 45745), (546, 39210), (585, 36596), (630, 33982), (780, 27447), (819, 26140), (910, 23526), (1092, 19605), (1170, 18298), (1260, 16991), (1307, 16380), (1365, 15684), (1638, 13070), (1820, 11763), (2340, 9149), (2614, 8190), (2730, 7842), (3276, 6535), (3921, 5460), (4095, 5228)]