81973450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:236

約数の個数: 72

約数和(自身を含む): 168488100

約数和(自身を除く): 86514650

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 89, 109, 130, 169, 178, 218, 325, 338, 445, 545, 650, 845, 890, 1090, 1157, 1417, 1690, 2225, 2314, 2725, 2834, 4225, 4450, 5450, 5785, 7085, 8450, 9701, 11570, 14170, 15041, 18421, 19402, 28925, 30082, 35425, 36842, 48505, 57850, 70850, 75205, 92105, 97010, 126113, 150410, 184210, 242525, 252226, 376025, 460525, 485050, 630565, 752050, 921050, 1261130, 1639469, 3152825, 3278938, 6305650, 8197345, 16394690, 40986725, 81973450]

約数ペア:

[(1, 81973450), (2, 40986725), (5, 16394690), (10, 8197345), (13, 6305650), (25, 3278938), (26, 3152825), (50, 1639469), (65, 1261130), (89, 921050), (109, 752050), (130, 630565), (169, 485050), (178, 460525), (218, 376025), (325, 252226), (338, 242525), (445, 184210), (545, 150410), (650, 126113), (845, 97010), (890, 92105), (1090, 75205), (1157, 70850), (1417, 57850), (1690, 48505), (2225, 36842), (2314, 35425), (2725, 30082), (2834, 28925), (4225, 19402), (4450, 18421), (5450, 15041), (5785, 14170), (7085, 11570), (8450, 9701)]