1920647560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{18749}}^1$

素因数の和:18970

約数の個数: 64

約数和(自身を含む): 4677750000

約数和(自身を除く): 2757102440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 197, 260, 394, 520, 788, 985, 1576, 1970, 2561, 3940, 5122, 7880, 10244, 12805, 18749, 20488, 25610, 37498, 51220, 74996, 93745, 102440, 149992, 187490, 243737, 374980, 487474, 749960, 974948, 1218685, 1949896, 2437370, 3693553, 4874740, 7387106, 9749480, 14774212, 18467765, 29548424, 36935530, 48016189, 73871060, 96032378, 147742120, 192064756, 240080945, 384129512, 480161890, 960323780, 1920647560]

約数ペア:

[(1, 1920647560), (2, 960323780), (4, 480161890), (5, 384129512), (8, 240080945), (10, 192064756), (13, 147742120), (20, 96032378), (26, 73871060), (40, 48016189), (52, 36935530), (65, 29548424), (104, 18467765), (130, 14774212), (197, 9749480), (260, 7387106), (394, 4874740), (520, 3693553), (788, 2437370), (985, 1949896), (1576, 1218685), (1970, 974948), (2561, 749960), (3940, 487474), (5122, 374980), (7880, 243737), (10244, 187490), (12805, 149992), (18749, 102440), (20488, 93745), (25610, 74996), (37498, 51220)]