18841880

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{439}}^1$

素因数の和:516

約数の個数: 64

約数和(自身を含む): 45144000

約数和(自身を除く): 26302120

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 37, 40, 58, 74, 116, 145, 148, 185, 232, 290, 296, 370, 439, 580, 740, 878, 1073, 1160, 1480, 1756, 2146, 2195, 3512, 4292, 4390, 5365, 8584, 8780, 10730, 12731, 16243, 17560, 21460, 25462, 32486, 42920, 50924, 63655, 64972, 81215, 101848, 127310, 129944, 162430, 254620, 324860, 471047, 509240, 649720, 942094, 1884188, 2355235, 3768376, 4710470, 9420940, 18841880]

約数ペア:

[(1, 18841880), (2, 9420940), (4, 4710470), (5, 3768376), (8, 2355235), (10, 1884188), (20, 942094), (29, 649720), (37, 509240), (40, 471047), (58, 324860), (74, 254620), (116, 162430), (145, 129944), (148, 127310), (185, 101848), (232, 81215), (290, 64972), (296, 63655), (370, 50924), (439, 42920), (580, 32486), (740, 25462), (878, 21460), (1073, 17560), (1160, 16243), (1480, 12731), (1756, 10730), (2146, 8780), (2195, 8584), (3512, 5365), (4292, 4390)]