39778460

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:446

約数の個数: 48

約数和(自身を含む): 85821120

約数和(自身を除く): 46042660

約数列:

[1, 2, 4, 5, 10, 20, 71, 109, 142, 218, 257, 284, 355, 436, 514, 545, 710, 1028, 1090, 1285, 1420, 2180, 2570, 5140, 7739, 15478, 18247, 28013, 30956, 36494, 38695, 56026, 72988, 77390, 91235, 112052, 140065, 154780, 182470, 280130, 364940, 560260, 1988923, 3977846, 7955692, 9944615, 19889230, 39778460]

約数ペア:

[(1, 39778460), (2, 19889230), (4, 9944615), (5, 7955692), (10, 3977846), (20, 1988923), (71, 560260), (109, 364940), (142, 280130), (218, 182470), (257, 154780), (284, 140065), (355, 112052), (436, 91235), (514, 77390), (545, 72988), (710, 56026), (1028, 38695), (1090, 36494), (1285, 30956), (1420, 28013), (2180, 18247), (2570, 15478), (5140, 7739)]