281497240

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1\times {\mathrm{257}}^1$

素因数の和:604

約数の個数: 64

約数和(自身を含む): 643658400

約数和(自身を除く): 362161160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 197, 257, 278, 394, 514, 556, 695, 788, 985, 1028, 1112, 1285, 1390, 1576, 1970, 2056, 2570, 2780, 3940, 5140, 5560, 7880, 10280, 27383, 35723, 50629, 54766, 71446, 101258, 109532, 136915, 142892, 178615, 202516, 219064, 253145, 273830, 285784, 357230, 405032, 506290, 547660, 714460, 1012580, 1095320, 1428920, 2025160, 7037431, 14074862, 28149724, 35187155, 56299448, 70374310, 140748620, 281497240]

約数ペア:

[(1, 281497240), (2, 140748620), (4, 70374310), (5, 56299448), (8, 35187155), (10, 28149724), (20, 14074862), (40, 7037431), (139, 2025160), (197, 1428920), (257, 1095320), (278, 1012580), (394, 714460), (514, 547660), (556, 506290), (695, 405032), (788, 357230), (985, 285784), (1028, 273830), (1112, 253145), (1285, 219064), (1390, 202516), (1576, 178615), (1970, 142892), (2056, 136915), (2570, 109532), (2780, 101258), (3940, 71446), (5140, 54766), (5560, 50629), (7880, 35723), (10280, 27383)]