81578560

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{461}}^1$

素因数の和:564

約数の個数: 112

約数和(自身を含む): 225308160

約数和(自身を除く): 143729600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 79, 80, 112, 140, 158, 160, 224, 280, 316, 320, 395, 448, 461, 553, 560, 632, 790, 922, 1106, 1120, 1264, 1580, 1844, 2212, 2240, 2305, 2528, 2765, 3160, 3227, 3688, 4424, 4610, 5056, 5530, 6320, 6454, 7376, 8848, 9220, 11060, 12640, 12908, 14752, 16135, 17696, 18440, 22120, 25280, 25816, 29504, 32270, 35392, 36419, 36880, 44240, 51632, 64540, 72838, 73760, 88480, 103264, 129080, 145676, 147520, 176960, 182095, 206528, 254933, 258160, 291352, 364190, 509866, 516320, 582704, 728380, 1019732, 1032640, 1165408, 1274665, 1456760, 2039464, 2330816, 2549330, 2913520, 4078928, 5098660, 5827040, 8157856, 10197320, 11654080, 16315712, 20394640, 40789280, 81578560]

約数ペア:

[(1, 81578560), (2, 40789280), (4, 20394640), (5, 16315712), (7, 11654080), (8, 10197320), (10, 8157856), (14, 5827040), (16, 5098660), (20, 4078928), (28, 2913520), (32, 2549330), (35, 2330816), (40, 2039464), (56, 1456760), (64, 1274665), (70, 1165408), (79, 1032640), (80, 1019732), (112, 728380), (140, 582704), (158, 516320), (160, 509866), (224, 364190), (280, 291352), (316, 258160), (320, 254933), (395, 206528), (448, 182095), (461, 176960), (553, 147520), (560, 145676), (632, 129080), (790, 103264), (922, 88480), (1106, 73760), (1120, 72838), (1264, 64540), (1580, 51632), (1844, 44240), (2212, 36880), (2240, 36419), (2305, 35392), (2528, 32270), (2765, 29504), (3160, 25816), (3227, 25280), (3688, 22120), (4424, 18440), (4610, 17696), (5056, 16135), (5530, 14752), (6320, 12908), (6454, 12640), (7376, 11060), (8848, 9220)]