16991720

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{193}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 40227840

約数和(自身を除く): 23236120

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 71, 124, 142, 155, 193, 248, 284, 310, 355, 386, 568, 620, 710, 772, 965, 1240, 1420, 1544, 1930, 2201, 2840, 3860, 4402, 5983, 7720, 8804, 11005, 11966, 13703, 17608, 22010, 23932, 27406, 29915, 44020, 47864, 54812, 59830, 68515, 88040, 109624, 119660, 137030, 239320, 274060, 424793, 548120, 849586, 1699172, 2123965, 3398344, 4247930, 8495860, 16991720]

約数ペア:

[(1, 16991720), (2, 8495860), (4, 4247930), (5, 3398344), (8, 2123965), (10, 1699172), (20, 849586), (31, 548120), (40, 424793), (62, 274060), (71, 239320), (124, 137030), (142, 119660), (155, 109624), (193, 88040), (248, 68515), (284, 59830), (310, 54812), (355, 47864), (386, 44020), (568, 29915), (620, 27406), (710, 23932), (772, 22010), (965, 17608), (1240, 13703), (1420, 11966), (1544, 11005), (1930, 8804), (2201, 7720), (2840, 5983), (3860, 4402)]