81388160

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{491}}^1$

素因数の和:554

約数の個数: 128

約数和(自身を含む): 228839040

約数和(自身を除く): 147450880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 37, 40, 56, 64, 70, 74, 80, 112, 128, 140, 148, 160, 185, 224, 259, 280, 296, 320, 370, 448, 491, 518, 560, 592, 640, 740, 896, 982, 1036, 1120, 1184, 1295, 1480, 1964, 2072, 2240, 2368, 2455, 2590, 2960, 3437, 3928, 4144, 4480, 4736, 4910, 5180, 5920, 6874, 7856, 8288, 9820, 10360, 11840, 13748, 15712, 16576, 17185, 18167, 19640, 20720, 23680, 27496, 31424, 33152, 34370, 36334, 39280, 41440, 54992, 62848, 68740, 72668, 78560, 82880, 90835, 109984, 127169, 137480, 145336, 157120, 165760, 181670, 219968, 254338, 274960, 290672, 314240, 363340, 439936, 508676, 549920, 581344, 635845, 726680, 1017352, 1099840, 1162688, 1271690, 1453360, 2034704, 2199680, 2325376, 2543380, 2906720, 4069408, 5086760, 5813440, 8138816, 10173520, 11626880, 16277632, 20347040, 40694080, 81388160]

約数ペア:

[(1, 81388160), (2, 40694080), (4, 20347040), (5, 16277632), (7, 11626880), (8, 10173520), (10, 8138816), (14, 5813440), (16, 5086760), (20, 4069408), (28, 2906720), (32, 2543380), (35, 2325376), (37, 2199680), (40, 2034704), (56, 1453360), (64, 1271690), (70, 1162688), (74, 1099840), (80, 1017352), (112, 726680), (128, 635845), (140, 581344), (148, 549920), (160, 508676), (185, 439936), (224, 363340), (259, 314240), (280, 290672), (296, 274960), (320, 254338), (370, 219968), (448, 181670), (491, 165760), (518, 157120), (560, 145336), (592, 137480), (640, 127169), (740, 109984), (896, 90835), (982, 82880), (1036, 78560), (1120, 72668), (1184, 68740), (1295, 62848), (1480, 54992), (1964, 41440), (2072, 39280), (2240, 36334), (2368, 34370), (2455, 33152), (2590, 31424), (2960, 27496), (3437, 23680), (3928, 20720), (4144, 19640), (4480, 18167), (4736, 17185), (4910, 16576), (5180, 15712), (5920, 13748), (6874, 11840), (7856, 10360), (8288, 9820)]