19810360

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{353}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 47407680

約数和(自身を除く): 27597320

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 61, 92, 115, 122, 184, 230, 244, 305, 353, 460, 488, 610, 706, 920, 1220, 1403, 1412, 1765, 2440, 2806, 2824, 3530, 5612, 7015, 7060, 8119, 11224, 14030, 14120, 16238, 21533, 28060, 32476, 40595, 43066, 56120, 64952, 81190, 86132, 107665, 162380, 172264, 215330, 324760, 430660, 495259, 861320, 990518, 1981036, 2476295, 3962072, 4952590, 9905180, 19810360]

約数ペア:

[(1, 19810360), (2, 9905180), (4, 4952590), (5, 3962072), (8, 2476295), (10, 1981036), (20, 990518), (23, 861320), (40, 495259), (46, 430660), (61, 324760), (92, 215330), (115, 172264), (122, 162380), (184, 107665), (230, 86132), (244, 81190), (305, 64952), (353, 56120), (460, 43066), (488, 40595), (610, 32476), (706, 28060), (920, 21533), (1220, 16238), (1403, 14120), (1412, 14030), (1765, 11224), (2440, 8119), (2806, 7060), (2824, 7015), (3530, 5612)]