81538240

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{409}}^1$

素因数の和:522

約数の個数: 112

約数和(自身を含む): 224942400

約数和(自身を除く): 143404160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 89, 112, 140, 160, 178, 224, 280, 320, 356, 409, 445, 448, 560, 623, 712, 818, 890, 1120, 1246, 1424, 1636, 1780, 2045, 2240, 2492, 2848, 2863, 3115, 3272, 3560, 4090, 4984, 5696, 5726, 6230, 6544, 7120, 8180, 9968, 11452, 12460, 13088, 14240, 14315, 16360, 19936, 22904, 24920, 26176, 28480, 28630, 32720, 36401, 39872, 45808, 49840, 57260, 65440, 72802, 91616, 99680, 114520, 130880, 145604, 182005, 183232, 199360, 229040, 254807, 291208, 364010, 458080, 509614, 582416, 728020, 916160, 1019228, 1164832, 1274035, 1456040, 2038456, 2329664, 2548070, 2912080, 4076912, 5096140, 5824160, 8153824, 10192280, 11648320, 16307648, 20384560, 40769120, 81538240]

約数ペア:

[(1, 81538240), (2, 40769120), (4, 20384560), (5, 16307648), (7, 11648320), (8, 10192280), (10, 8153824), (14, 5824160), (16, 5096140), (20, 4076912), (28, 2912080), (32, 2548070), (35, 2329664), (40, 2038456), (56, 1456040), (64, 1274035), (70, 1164832), (80, 1019228), (89, 916160), (112, 728020), (140, 582416), (160, 509614), (178, 458080), (224, 364010), (280, 291208), (320, 254807), (356, 229040), (409, 199360), (445, 183232), (448, 182005), (560, 145604), (623, 130880), (712, 114520), (818, 99680), (890, 91616), (1120, 72802), (1246, 65440), (1424, 57260), (1636, 49840), (1780, 45808), (2045, 39872), (2240, 36401), (2492, 32720), (2848, 28630), (2863, 28480), (3115, 26176), (3272, 24920), (3560, 22904), (4090, 19936), (4984, 16360), (5696, 14315), (5726, 14240), (6230, 13088), (6544, 12460), (7120, 11452), (8180, 9968)]