158000000

素因数分解:

$2^7\times 5^6\times {\mathrm{79}}^1$

素因数の和:123

約数の個数: 112

約数和(自身を含む): 398432400

約数和(自身を除く): 240432400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 79, 80, 100, 125, 128, 158, 160, 200, 250, 316, 320, 395, 400, 500, 625, 632, 640, 790, 800, 1000, 1250, 1264, 1580, 1600, 1975, 2000, 2500, 2528, 3125, 3160, 3200, 3950, 4000, 5000, 5056, 6250, 6320, 7900, 8000, 9875, 10000, 10112, 12500, 12640, 15625, 15800, 16000, 19750, 20000, 25000, 25280, 31250, 31600, 39500, 40000, 49375, 50000, 50560, 62500, 63200, 79000, 80000, 98750, 100000, 125000, 126400, 158000, 197500, 200000, 246875, 250000, 252800, 316000, 395000, 400000, 493750, 500000, 632000, 790000, 987500, 1000000, 1234375, 1264000, 1580000, 1975000, 2000000, 2468750, 3160000, 3950000, 4937500, 6320000, 7900000, 9875000, 15800000, 19750000, 31600000, 39500000, 79000000, 158000000]

約数ペア:

[(1, 158000000), (2, 79000000), (4, 39500000), (5, 31600000), (8, 19750000), (10, 15800000), (16, 9875000), (20, 7900000), (25, 6320000), (32, 4937500), (40, 3950000), (50, 3160000), (64, 2468750), (79, 2000000), (80, 1975000), (100, 1580000), (125, 1264000), (128, 1234375), (158, 1000000), (160, 987500), (200, 790000), (250, 632000), (316, 500000), (320, 493750), (395, 400000), (400, 395000), (500, 316000), (625, 252800), (632, 250000), (640, 246875), (790, 200000), (800, 197500), (1000, 158000), (1250, 126400), (1264, 125000), (1580, 100000), (1600, 98750), (1975, 80000), (2000, 79000), (2500, 63200), (2528, 62500), (3125, 50560), (3160, 50000), (3200, 49375), (3950, 40000), (4000, 39500), (5000, 31600), (5056, 31250), (6250, 25280), (6320, 25000), (7900, 20000), (8000, 19750), (9875, 16000), (10000, 15800), (10112, 15625), (12500, 12640)]