20780800

素因数分解:

$2^8\times 5^2\times {\mathrm{17}}^1\times {\mathrm{191}}^1$

素因数の和:234

約数の個数: 108

約数和(自身を含む): 54746496

約数和(自身を除く): 33965696

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 25, 32, 34, 40, 50, 64, 68, 80, 85, 100, 128, 136, 160, 170, 191, 200, 256, 272, 320, 340, 382, 400, 425, 544, 640, 680, 764, 800, 850, 955, 1088, 1280, 1360, 1528, 1600, 1700, 1910, 2176, 2720, 3056, 3200, 3247, 3400, 3820, 4352, 4775, 5440, 6112, 6400, 6494, 6800, 7640, 9550, 10880, 12224, 12988, 13600, 15280, 16235, 19100, 21760, 24448, 25976, 27200, 30560, 32470, 38200, 48896, 51952, 54400, 61120, 64940, 76400, 81175, 103904, 108800, 122240, 129880, 152800, 162350, 207808, 244480, 259760, 305600, 324700, 415616, 519520, 611200, 649400, 831232, 1039040, 1222400, 1298800, 2078080, 2597600, 4156160, 5195200, 10390400, 20780800]

約数ペア:

[(1, 20780800), (2, 10390400), (4, 5195200), (5, 4156160), (8, 2597600), (10, 2078080), (16, 1298800), (17, 1222400), (20, 1039040), (25, 831232), (32, 649400), (34, 611200), (40, 519520), (50, 415616), (64, 324700), (68, 305600), (80, 259760), (85, 244480), (100, 207808), (128, 162350), (136, 152800), (160, 129880), (170, 122240), (191, 108800), (200, 103904), (256, 81175), (272, 76400), (320, 64940), (340, 61120), (382, 54400), (400, 51952), (425, 48896), (544, 38200), (640, 32470), (680, 30560), (764, 27200), (800, 25976), (850, 24448), (955, 21760), (1088, 19100), (1280, 16235), (1360, 15280), (1528, 13600), (1600, 12988), (1700, 12224), (1910, 10880), (2176, 9550), (2720, 7640), (3056, 6800), (3200, 6494), (3247, 6400), (3400, 6112), (3820, 5440), (4352, 4775)]