890994620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{457}}^1\times {\mathrm{1373}}^1$

素因数の和:1910

約数の個数: 48

約数和(自身を含む): 1902979008

約数和(自身を除く): 1011984388

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 457, 710, 914, 1373, 1420, 1828, 2285, 2746, 4570, 5492, 6865, 9140, 13730, 27460, 32447, 64894, 97483, 129788, 162235, 194966, 324470, 389932, 487415, 627461, 648940, 974830, 1254922, 1949660, 2509844, 3137305, 6274610, 12549220, 44549731, 89099462, 178198924, 222748655, 445497310, 890994620]

約数ペア:

[(1, 890994620), (2, 445497310), (4, 222748655), (5, 178198924), (10, 89099462), (20, 44549731), (71, 12549220), (142, 6274610), (284, 3137305), (355, 2509844), (457, 1949660), (710, 1254922), (914, 974830), (1373, 648940), (1420, 627461), (1828, 487415), (2285, 389932), (2746, 324470), (4570, 194966), (5492, 162235), (6865, 129788), (9140, 97483), (13730, 64894), (27460, 32447)]