639996

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{401}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 1800960

約数和(自身を除く): 1160964

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 19, 21, 28, 38, 42, 57, 76, 84, 114, 133, 228, 266, 399, 401, 532, 798, 802, 1203, 1596, 1604, 2406, 2807, 4812, 5614, 7619, 8421, 11228, 15238, 16842, 22857, 30476, 33684, 45714, 53333, 91428, 106666, 159999, 213332, 319998, 639996]

約数ペア:

[(1, 639996), (2, 319998), (3, 213332), (4, 159999), (6, 106666), (7, 91428), (12, 53333), (14, 45714), (19, 33684), (21, 30476), (28, 22857), (38, 16842), (42, 15238), (57, 11228), (76, 8421), (84, 7619), (114, 5614), (133, 4812), (228, 2807), (266, 2406), (399, 1604), (401, 1596), (532, 1203), (798, 802)]