19901220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:317

約数の個数: 96

約数和(自身を含む): 59875200

約数和(自身を除く): 39973980

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 109, 170, 179, 204, 218, 255, 327, 340, 358, 436, 510, 537, 545, 654, 716, 895, 1020, 1074, 1090, 1308, 1635, 1790, 1853, 2148, 2180, 2685, 3043, 3270, 3580, 3706, 5370, 5559, 6086, 6540, 7412, 9129, 9265, 10740, 11118, 12172, 15215, 18258, 18530, 19511, 22236, 27795, 30430, 36516, 37060, 39022, 45645, 55590, 58533, 60860, 78044, 91290, 97555, 111180, 117066, 182580, 195110, 234132, 292665, 331687, 390220, 585330, 663374, 995061, 1170660, 1326748, 1658435, 1990122, 3316870, 3980244, 4975305, 6633740, 9950610, 19901220]

約数ペア:

[(1, 19901220), (2, 9950610), (3, 6633740), (4, 4975305), (5, 3980244), (6, 3316870), (10, 1990122), (12, 1658435), (15, 1326748), (17, 1170660), (20, 995061), (30, 663374), (34, 585330), (51, 390220), (60, 331687), (68, 292665), (85, 234132), (102, 195110), (109, 182580), (170, 117066), (179, 111180), (204, 97555), (218, 91290), (255, 78044), (327, 60860), (340, 58533), (358, 55590), (436, 45645), (510, 39022), (537, 37060), (545, 36516), (654, 30430), (716, 27795), (895, 22236), (1020, 19511), (1074, 18530), (1090, 18258), (1308, 15215), (1635, 12172), (1790, 11118), (1853, 10740), (2148, 9265), (2180, 9129), (2685, 7412), (3043, 6540), (3270, 6086), (3580, 5559), (3706, 5370)]