81571980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{359}}^1\times {\mathrm{541}}^1$

素因数の和:919

約数の個数: 96

約数和(自身を含む): 262241280

約数和(自身を除く): 180669300

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 359, 420, 541, 718, 1077, 1082, 1436, 1623, 1795, 2154, 2164, 2513, 2705, 3246, 3590, 3787, 4308, 5026, 5385, 5410, 6492, 7180, 7539, 7574, 8115, 10052, 10770, 10820, 11361, 12565, 15078, 15148, 16230, 18935, 21540, 22722, 25130, 30156, 32460, 37695, 37870, 45444, 50260, 56805, 75390, 75740, 113610, 150780, 194219, 227220, 388438, 582657, 776876, 971095, 1165314, 1359533, 1942190, 2330628, 2719066, 2913285, 3884380, 4078599, 5438132, 5826570, 6797665, 8157198, 11653140, 13595330, 16314396, 20392995, 27190660, 40785990, 81571980]

約数ペア:

[(1, 81571980), (2, 40785990), (3, 27190660), (4, 20392995), (5, 16314396), (6, 13595330), (7, 11653140), (10, 8157198), (12, 6797665), (14, 5826570), (15, 5438132), (20, 4078599), (21, 3884380), (28, 2913285), (30, 2719066), (35, 2330628), (42, 1942190), (60, 1359533), (70, 1165314), (84, 971095), (105, 776876), (140, 582657), (210, 388438), (359, 227220), (420, 194219), (541, 150780), (718, 113610), (1077, 75740), (1082, 75390), (1436, 56805), (1623, 50260), (1795, 45444), (2154, 37870), (2164, 37695), (2513, 32460), (2705, 30156), (3246, 25130), (3590, 22722), (3787, 21540), (4308, 18935), (5026, 16230), (5385, 15148), (5410, 15078), (6492, 12565), (7180, 11361), (7539, 10820), (7574, 10770), (8115, 10052)]