31120000

素因数分解:

$2^7\times 5^4\times {\mathrm{389}}^1$

素因数の和:423

約数の個数: 80

約数和(自身を含む): 77670450

約数和(自身を除く): 46550450

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 389, 400, 500, 625, 640, 778, 800, 1000, 1250, 1556, 1600, 1945, 2000, 2500, 3112, 3200, 3890, 4000, 5000, 6224, 7780, 8000, 9725, 10000, 12448, 15560, 16000, 19450, 20000, 24896, 31120, 38900, 40000, 48625, 49792, 62240, 77800, 80000, 97250, 124480, 155600, 194500, 243125, 248960, 311200, 389000, 486250, 622400, 778000, 972500, 1244800, 1556000, 1945000, 3112000, 3890000, 6224000, 7780000, 15560000, 31120000]

約数ペア:

[(1, 31120000), (2, 15560000), (4, 7780000), (5, 6224000), (8, 3890000), (10, 3112000), (16, 1945000), (20, 1556000), (25, 1244800), (32, 972500), (40, 778000), (50, 622400), (64, 486250), (80, 389000), (100, 311200), (125, 248960), (128, 243125), (160, 194500), (200, 155600), (250, 124480), (320, 97250), (389, 80000), (400, 77800), (500, 62240), (625, 49792), (640, 48625), (778, 40000), (800, 38900), (1000, 31120), (1250, 24896), (1556, 20000), (1600, 19450), (1945, 16000), (2000, 15560), (2500, 12448), (3112, 10000), (3200, 9725), (3890, 8000), (4000, 7780), (5000, 6224)]