81994640

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1609}}^1$

素因数の和:1649

約数の個数: 120

約数和(自身を含む): 238969080

約数和(自身を除く): 156974440

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 49, 52, 56, 65, 70, 80, 91, 98, 104, 112, 130, 140, 182, 196, 208, 245, 260, 280, 364, 392, 455, 490, 520, 560, 637, 728, 784, 910, 980, 1040, 1274, 1456, 1609, 1820, 1960, 2548, 3185, 3218, 3640, 3920, 5096, 6370, 6436, 7280, 8045, 10192, 11263, 12740, 12872, 16090, 20917, 22526, 25480, 25744, 32180, 41834, 45052, 50960, 56315, 64360, 78841, 83668, 90104, 104585, 112630, 128720, 146419, 157682, 167336, 180208, 209170, 225260, 292838, 315364, 334672, 394205, 418340, 450520, 585676, 630728, 732095, 788410, 836680, 901040, 1024933, 1171352, 1261456, 1464190, 1576820, 1673360, 2049866, 2342704, 2928380, 3153640, 4099732, 5124665, 5856760, 6307280, 8199464, 10249330, 11713520, 16398928, 20498660, 40997320, 81994640]

約数ペア:

[(1, 81994640), (2, 40997320), (4, 20498660), (5, 16398928), (7, 11713520), (8, 10249330), (10, 8199464), (13, 6307280), (14, 5856760), (16, 5124665), (20, 4099732), (26, 3153640), (28, 2928380), (35, 2342704), (40, 2049866), (49, 1673360), (52, 1576820), (56, 1464190), (65, 1261456), (70, 1171352), (80, 1024933), (91, 901040), (98, 836680), (104, 788410), (112, 732095), (130, 630728), (140, 585676), (182, 450520), (196, 418340), (208, 394205), (245, 334672), (260, 315364), (280, 292838), (364, 225260), (392, 209170), (455, 180208), (490, 167336), (520, 157682), (560, 146419), (637, 128720), (728, 112630), (784, 104585), (910, 90104), (980, 83668), (1040, 78841), (1274, 64360), (1456, 56315), (1609, 50960), (1820, 45052), (1960, 41834), (2548, 32180), (3185, 25744), (3218, 25480), (3640, 22526), (3920, 20917), (5096, 16090), (6370, 12872), (6436, 12740), (7280, 11263), (8045, 10192)]