645445220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{17939}}^1$

素因数の和:18212

約数の個数: 48

約数和(自身を含む): 1555182720

約数和(自身を除く): 909737500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 257, 514, 1028, 1285, 1799, 2570, 3598, 5140, 7196, 8995, 17939, 17990, 35878, 35980, 71756, 89695, 125573, 179390, 251146, 358780, 502292, 627865, 1255730, 2511460, 4610323, 9220646, 18441292, 23051615, 32272261, 46103230, 64544522, 92206460, 129089044, 161361305, 322722610, 645445220]

約数ペア:

[(1, 645445220), (2, 322722610), (4, 161361305), (5, 129089044), (7, 92206460), (10, 64544522), (14, 46103230), (20, 32272261), (28, 23051615), (35, 18441292), (70, 9220646), (140, 4610323), (257, 2511460), (514, 1255730), (1028, 627865), (1285, 502292), (1799, 358780), (2570, 251146), (3598, 179390), (5140, 125573), (7196, 89695), (8995, 71756), (17939, 35980), (17990, 35878)]