19519720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:179

約数の個数: 96

約数和(自身を含む): 50034600

約数和(自身を除く): 30514880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 109, 110, 121, 148, 185, 218, 220, 242, 296, 370, 407, 436, 440, 484, 545, 605, 740, 814, 872, 968, 1090, 1199, 1210, 1480, 1628, 2035, 2180, 2398, 2420, 3256, 4033, 4070, 4360, 4477, 4796, 4840, 5995, 8066, 8140, 8954, 9592, 11990, 13189, 16132, 16280, 17908, 20165, 22385, 23980, 26378, 32264, 35816, 40330, 44363, 44770, 47960, 52756, 65945, 80660, 88726, 89540, 105512, 131890, 161320, 177452, 179080, 221815, 263780, 354904, 443630, 487993, 527560, 887260, 975986, 1774520, 1951972, 2439965, 3903944, 4879930, 9759860, 19519720]

約数ペア:

[(1, 19519720), (2, 9759860), (4, 4879930), (5, 3903944), (8, 2439965), (10, 1951972), (11, 1774520), (20, 975986), (22, 887260), (37, 527560), (40, 487993), (44, 443630), (55, 354904), (74, 263780), (88, 221815), (109, 179080), (110, 177452), (121, 161320), (148, 131890), (185, 105512), (218, 89540), (220, 88726), (242, 80660), (296, 65945), (370, 52756), (407, 47960), (436, 44770), (440, 44363), (484, 40330), (545, 35816), (605, 32264), (740, 26378), (814, 23980), (872, 22385), (968, 20165), (1090, 17908), (1199, 16280), (1210, 16132), (1480, 13189), (1628, 11990), (2035, 9592), (2180, 8954), (2398, 8140), (2420, 8066), (3256, 5995), (4033, 4840), (4070, 4796), (4360, 4477)]