639673600

素因数分解:

$2^8\times 5^2\times {\mathrm{127}}^1\times {\mathrm{787}}^1$

素因数の和:940

約数の個数: 108

約数和(自身を含む): 1597786624

約数和(自身を除く): 958113024

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 127, 128, 160, 200, 254, 256, 320, 400, 508, 635, 640, 787, 800, 1016, 1270, 1280, 1574, 1600, 2032, 2540, 3148, 3175, 3200, 3935, 4064, 5080, 6296, 6350, 6400, 7870, 8128, 10160, 12592, 12700, 15740, 16256, 19675, 20320, 25184, 25400, 31480, 32512, 39350, 40640, 50368, 50800, 62960, 78700, 81280, 99949, 100736, 101600, 125920, 157400, 162560, 199898, 201472, 203200, 251840, 314800, 399796, 406400, 499745, 503680, 629600, 799592, 812800, 999490, 1007360, 1259200, 1599184, 1998980, 2498725, 2518400, 3198368, 3997960, 4997450, 5036800, 6396736, 7995920, 9994900, 12793472, 15991840, 19989800, 25586944, 31983680, 39979600, 63967360, 79959200, 127934720, 159918400, 319836800, 639673600]

約数ペア:

[(1, 639673600), (2, 319836800), (4, 159918400), (5, 127934720), (8, 79959200), (10, 63967360), (16, 39979600), (20, 31983680), (25, 25586944), (32, 19989800), (40, 15991840), (50, 12793472), (64, 9994900), (80, 7995920), (100, 6396736), (127, 5036800), (128, 4997450), (160, 3997960), (200, 3198368), (254, 2518400), (256, 2498725), (320, 1998980), (400, 1599184), (508, 1259200), (635, 1007360), (640, 999490), (787, 812800), (800, 799592), (1016, 629600), (1270, 503680), (1280, 499745), (1574, 406400), (1600, 399796), (2032, 314800), (2540, 251840), (3148, 203200), (3175, 201472), (3200, 199898), (3935, 162560), (4064, 157400), (5080, 125920), (6296, 101600), (6350, 100736), (6400, 99949), (7870, 81280), (8128, 78700), (10160, 62960), (12592, 50800), (12700, 50368), (15740, 40640), (16256, 39350), (19675, 32512), (20320, 31480), (25184, 25400)]