20649860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{53}}^1$

素因数の和:114

約数の個数: 144

約数和(自身を含む): 57915648

約数和(自身を除く): 37265788

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 23, 28, 35, 44, 46, 53, 55, 70, 77, 92, 106, 110, 115, 121, 140, 154, 161, 212, 220, 230, 242, 253, 265, 308, 322, 371, 385, 460, 484, 506, 530, 583, 605, 644, 742, 770, 805, 847, 1012, 1060, 1166, 1210, 1219, 1265, 1484, 1540, 1610, 1694, 1771, 1855, 2332, 2420, 2438, 2530, 2783, 2915, 3220, 3388, 3542, 3710, 4081, 4235, 4876, 5060, 5566, 5830, 6095, 6413, 7084, 7420, 8162, 8470, 8533, 8855, 11132, 11660, 12190, 12826, 13409, 13915, 16324, 16940, 17066, 17710, 19481, 20405, 24380, 25652, 26818, 27830, 32065, 34132, 35420, 38962, 40810, 42665, 44891, 53636, 55660, 64130, 67045, 77924, 81620, 85330, 89782, 93863, 97405, 128260, 134090, 147499, 170660, 179564, 187726, 194810, 224455, 268180, 294998, 375452, 389620, 448910, 469315, 589996, 737495, 897820, 938630, 1032493, 1474990, 1877260, 2064986, 2949980, 4129972, 5162465, 10324930, 20649860]

約数ペア:

[(1, 20649860), (2, 10324930), (4, 5162465), (5, 4129972), (7, 2949980), (10, 2064986), (11, 1877260), (14, 1474990), (20, 1032493), (22, 938630), (23, 897820), (28, 737495), (35, 589996), (44, 469315), (46, 448910), (53, 389620), (55, 375452), (70, 294998), (77, 268180), (92, 224455), (106, 194810), (110, 187726), (115, 179564), (121, 170660), (140, 147499), (154, 134090), (161, 128260), (212, 97405), (220, 93863), (230, 89782), (242, 85330), (253, 81620), (265, 77924), (308, 67045), (322, 64130), (371, 55660), (385, 53636), (460, 44891), (484, 42665), (506, 40810), (530, 38962), (583, 35420), (605, 34132), (644, 32065), (742, 27830), (770, 26818), (805, 25652), (847, 24380), (1012, 20405), (1060, 19481), (1166, 17710), (1210, 17066), (1219, 16940), (1265, 16324), (1484, 13915), (1540, 13409), (1610, 12826), (1694, 12190), (1771, 11660), (1855, 11132), (2332, 8855), (2420, 8533), (2438, 8470), (2530, 8162), (2783, 7420), (2915, 7084), (3220, 6413), (3388, 6095), (3542, 5830), (3710, 5566), (4081, 5060), (4235, 4876)]