390640

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1$

素因数の和:289

約数の個数: 40

約数和(自身を含む): 959760

約数和(自身を除く): 569120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 257, 304, 380, 514, 760, 1028, 1285, 1520, 2056, 2570, 4112, 4883, 5140, 9766, 10280, 19532, 20560, 24415, 39064, 48830, 78128, 97660, 195320, 390640]

約数ペア:

[(1, 390640), (2, 195320), (4, 97660), (5, 78128), (8, 48830), (10, 39064), (16, 24415), (19, 20560), (20, 19532), (38, 10280), (40, 9766), (76, 5140), (80, 4883), (95, 4112), (152, 2570), (190, 2056), (257, 1520), (304, 1285), (380, 1028), (514, 760)]