19913600

素因数分解:

$2^7\times 5^2\times 7^2\times {\mathrm{127}}^1$

素因数の和:165

約数の個数: 144

約数和(自身を含む): 57674880

約数和(自身を除く): 37761280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 49, 50, 56, 64, 70, 80, 98, 100, 112, 127, 128, 140, 160, 175, 196, 200, 224, 245, 254, 280, 320, 350, 392, 400, 448, 490, 508, 560, 635, 640, 700, 784, 800, 889, 896, 980, 1016, 1120, 1225, 1270, 1400, 1568, 1600, 1778, 1960, 2032, 2240, 2450, 2540, 2800, 3136, 3175, 3200, 3556, 3920, 4064, 4445, 4480, 4900, 5080, 5600, 6223, 6272, 6350, 7112, 7840, 8128, 8890, 9800, 10160, 11200, 12446, 12700, 14224, 15680, 16256, 17780, 19600, 20320, 22225, 22400, 24892, 25400, 28448, 31115, 31360, 35560, 39200, 40640, 44450, 49784, 50800, 56896, 62230, 71120, 78400, 81280, 88900, 99568, 101600, 113792, 124460, 142240, 155575, 156800, 177800, 199136, 203200, 248920, 284480, 311150, 355600, 398272, 406400, 497840, 568960, 622300, 711200, 796544, 995680, 1244600, 1422400, 1991360, 2489200, 2844800, 3982720, 4978400, 9956800, 19913600]

約数ペア:

[(1, 19913600), (2, 9956800), (4, 4978400), (5, 3982720), (7, 2844800), (8, 2489200), (10, 1991360), (14, 1422400), (16, 1244600), (20, 995680), (25, 796544), (28, 711200), (32, 622300), (35, 568960), (40, 497840), (49, 406400), (50, 398272), (56, 355600), (64, 311150), (70, 284480), (80, 248920), (98, 203200), (100, 199136), (112, 177800), (127, 156800), (128, 155575), (140, 142240), (160, 124460), (175, 113792), (196, 101600), (200, 99568), (224, 88900), (245, 81280), (254, 78400), (280, 71120), (320, 62230), (350, 56896), (392, 50800), (400, 49784), (448, 44450), (490, 40640), (508, 39200), (560, 35560), (635, 31360), (640, 31115), (700, 28448), (784, 25400), (800, 24892), (889, 22400), (896, 22225), (980, 20320), (1016, 19600), (1120, 17780), (1225, 16256), (1270, 15680), (1400, 14224), (1568, 12700), (1600, 12446), (1778, 11200), (1960, 10160), (2032, 9800), (2240, 8890), (2450, 8128), (2540, 7840), (2800, 7112), (3136, 6350), (3175, 6272), (3200, 6223), (3556, 5600), (3920, 5080), (4064, 4900), (4445, 4480)]