28750000

素因数分解:

$2^4\times 5^7\times {\mathrm{23}}^1$

素因数の和:66

約数の個数: 80

約数和(自身を含む): 72656064

約数和(自身を除く): 43906064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 25, 40, 46, 50, 80, 92, 100, 115, 125, 184, 200, 230, 250, 368, 400, 460, 500, 575, 625, 920, 1000, 1150, 1250, 1840, 2000, 2300, 2500, 2875, 3125, 4600, 5000, 5750, 6250, 9200, 10000, 11500, 12500, 14375, 15625, 23000, 25000, 28750, 31250, 46000, 50000, 57500, 62500, 71875, 78125, 115000, 125000, 143750, 156250, 230000, 250000, 287500, 312500, 359375, 575000, 625000, 718750, 1150000, 1250000, 1437500, 1796875, 2875000, 3593750, 5750000, 7187500, 14375000, 28750000]

約数ペア:

[(1, 28750000), (2, 14375000), (4, 7187500), (5, 5750000), (8, 3593750), (10, 2875000), (16, 1796875), (20, 1437500), (23, 1250000), (25, 1150000), (40, 718750), (46, 625000), (50, 575000), (80, 359375), (92, 312500), (100, 287500), (115, 250000), (125, 230000), (184, 156250), (200, 143750), (230, 125000), (250, 115000), (368, 78125), (400, 71875), (460, 62500), (500, 57500), (575, 50000), (625, 46000), (920, 31250), (1000, 28750), (1150, 25000), (1250, 23000), (1840, 15625), (2000, 14375), (2300, 12500), (2500, 11500), (2875, 10000), (3125, 9200), (4600, 6250), (5000, 5750)]