399280

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:74

約数の個数: 80

約数和(自身を含む): 1142784

約数和(自身を除く): 743504

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 31, 35, 40, 46, 56, 62, 70, 80, 92, 112, 115, 124, 140, 155, 161, 184, 217, 230, 248, 280, 310, 322, 368, 434, 460, 496, 560, 620, 644, 713, 805, 868, 920, 1085, 1240, 1288, 1426, 1610, 1736, 1840, 2170, 2480, 2576, 2852, 3220, 3472, 3565, 4340, 4991, 5704, 6440, 7130, 8680, 9982, 11408, 12880, 14260, 17360, 19964, 24955, 28520, 39928, 49910, 57040, 79856, 99820, 199640, 399280]

約数ペア:

[(1, 399280), (2, 199640), (4, 99820), (5, 79856), (7, 57040), (8, 49910), (10, 39928), (14, 28520), (16, 24955), (20, 19964), (23, 17360), (28, 14260), (31, 12880), (35, 11408), (40, 9982), (46, 8680), (56, 7130), (62, 6440), (70, 5704), (80, 4991), (92, 4340), (112, 3565), (115, 3472), (124, 3220), (140, 2852), (155, 2576), (161, 2480), (184, 2170), (217, 1840), (230, 1736), (248, 1610), (280, 1426), (310, 1288), (322, 1240), (368, 1085), (434, 920), (460, 868), (496, 805), (560, 713), (620, 644)]