78996820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{541}}^1$

素因数の和:713

約数の個数: 72

約数和(自身を含む): 194632200

約数和(自身を除く): 115635380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 149, 196, 245, 298, 490, 541, 596, 745, 980, 1043, 1082, 1490, 2086, 2164, 2705, 2980, 3787, 4172, 5215, 5410, 7301, 7574, 10430, 10820, 14602, 15148, 18935, 20860, 26509, 29204, 36505, 37870, 53018, 73010, 75740, 80609, 106036, 132545, 146020, 161218, 265090, 322436, 403045, 530180, 564263, 806090, 1128526, 1612180, 2257052, 2821315, 3949841, 5642630, 7899682, 11285260, 15799364, 19749205, 39498410, 78996820]

約数ペア:

[(1, 78996820), (2, 39498410), (4, 19749205), (5, 15799364), (7, 11285260), (10, 7899682), (14, 5642630), (20, 3949841), (28, 2821315), (35, 2257052), (49, 1612180), (70, 1128526), (98, 806090), (140, 564263), (149, 530180), (196, 403045), (245, 322436), (298, 265090), (490, 161218), (541, 146020), (596, 132545), (745, 106036), (980, 80609), (1043, 75740), (1082, 73010), (1490, 53018), (2086, 37870), (2164, 36505), (2705, 29204), (2980, 26509), (3787, 20860), (4172, 18935), (5215, 15148), (5410, 14602), (7301, 10820), (7574, 10430)]