68900000

素因数分解:

$2^5\times 5^5\times {\mathrm{13}}^1\times {\mathrm{53}}^1$

素因数の和:101

約数の個数: 144

約数和(自身を含む): 186034968

約数和(自身を除く): 117134968

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 50, 52, 53, 65, 80, 100, 104, 106, 125, 130, 160, 200, 208, 212, 250, 260, 265, 325, 400, 416, 424, 500, 520, 530, 625, 650, 689, 800, 848, 1000, 1040, 1060, 1250, 1300, 1325, 1378, 1625, 1696, 2000, 2080, 2120, 2500, 2600, 2650, 2756, 3125, 3250, 3445, 4000, 4240, 5000, 5200, 5300, 5512, 6250, 6500, 6625, 6890, 8125, 8480, 10000, 10400, 10600, 11024, 12500, 13000, 13250, 13780, 16250, 17225, 20000, 21200, 22048, 25000, 26000, 26500, 27560, 32500, 33125, 34450, 40625, 42400, 50000, 52000, 53000, 55120, 65000, 66250, 68900, 81250, 86125, 100000, 106000, 110240, 130000, 132500, 137800, 162500, 165625, 172250, 212000, 260000, 265000, 275600, 325000, 331250, 344500, 430625, 530000, 551200, 650000, 662500, 689000, 861250, 1060000, 1300000, 1325000, 1378000, 1722500, 2153125, 2650000, 2756000, 3445000, 4306250, 5300000, 6890000, 8612500, 13780000, 17225000, 34450000, 68900000]

約数ペア:

[(1, 68900000), (2, 34450000), (4, 17225000), (5, 13780000), (8, 8612500), (10, 6890000), (13, 5300000), (16, 4306250), (20, 3445000), (25, 2756000), (26, 2650000), (32, 2153125), (40, 1722500), (50, 1378000), (52, 1325000), (53, 1300000), (65, 1060000), (80, 861250), (100, 689000), (104, 662500), (106, 650000), (125, 551200), (130, 530000), (160, 430625), (200, 344500), (208, 331250), (212, 325000), (250, 275600), (260, 265000), (265, 260000), (325, 212000), (400, 172250), (416, 165625), (424, 162500), (500, 137800), (520, 132500), (530, 130000), (625, 110240), (650, 106000), (689, 100000), (800, 86125), (848, 81250), (1000, 68900), (1040, 66250), (1060, 65000), (1250, 55120), (1300, 53000), (1325, 52000), (1378, 50000), (1625, 42400), (1696, 40625), (2000, 34450), (2080, 33125), (2120, 32500), (2500, 27560), (2600, 26500), (2650, 26000), (2756, 25000), (3125, 22048), (3250, 21200), (3445, 20000), (4000, 17225), (4240, 16250), (5000, 13780), (5200, 13250), (5300, 13000), (5512, 12500), (6250, 11024), (6500, 10600), (6625, 10400), (6890, 10000), (8125, 8480)]