19781200

素因数分解:

$2^4\times 5^2\times {\mathrm{17}}^1\times {\mathrm{2909}}^1$

素因数の和:2944

約数の個数: 60

約数和(自身を含む): 50337180

約数和(自身を除く): 30555980

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 34, 40, 50, 68, 80, 85, 100, 136, 170, 200, 272, 340, 400, 425, 680, 850, 1360, 1700, 2909, 3400, 5818, 6800, 11636, 14545, 23272, 29090, 46544, 49453, 58180, 72725, 98906, 116360, 145450, 197812, 232720, 247265, 290900, 395624, 494530, 581800, 791248, 989060, 1163600, 1236325, 1978120, 2472650, 3956240, 4945300, 9890600, 19781200]

約数ペア:

[(1, 19781200), (2, 9890600), (4, 4945300), (5, 3956240), (8, 2472650), (10, 1978120), (16, 1236325), (17, 1163600), (20, 989060), (25, 791248), (34, 581800), (40, 494530), (50, 395624), (68, 290900), (80, 247265), (85, 232720), (100, 197812), (136, 145450), (170, 116360), (200, 98906), (272, 72725), (340, 58180), (400, 49453), (425, 46544), (680, 29090), (850, 23272), (1360, 14545), (1700, 11636), (2909, 6800), (3400, 5818)]