18919980

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{229}}^1$

素因数の和:270

約数の個数: 144

約数和(自身を含む): 63292320

約数和(自身を除く): 44372340

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 27, 30, 34, 36, 45, 51, 54, 60, 68, 81, 85, 90, 102, 108, 135, 153, 162, 170, 180, 204, 229, 243, 255, 270, 306, 324, 340, 405, 458, 459, 486, 510, 540, 612, 687, 765, 810, 916, 918, 972, 1020, 1145, 1215, 1374, 1377, 1530, 1620, 1836, 2061, 2290, 2295, 2430, 2748, 2754, 3060, 3435, 3893, 4122, 4131, 4580, 4590, 4860, 5508, 6183, 6870, 6885, 7786, 8244, 8262, 9180, 10305, 11679, 12366, 13740, 13770, 15572, 16524, 18549, 19465, 20610, 20655, 23358, 24732, 27540, 30915, 35037, 37098, 38930, 41220, 41310, 46716, 55647, 58395, 61830, 70074, 74196, 77860, 82620, 92745, 105111, 111294, 116790, 123660, 140148, 175185, 185490, 210222, 222588, 233580, 278235, 315333, 350370, 370980, 420444, 525555, 556470, 630666, 700740, 945999, 1051110, 1112940, 1261332, 1576665, 1891998, 2102220, 3153330, 3783996, 4729995, 6306660, 9459990, 18919980]

約数ペア:

[(1, 18919980), (2, 9459990), (3, 6306660), (4, 4729995), (5, 3783996), (6, 3153330), (9, 2102220), (10, 1891998), (12, 1576665), (15, 1261332), (17, 1112940), (18, 1051110), (20, 945999), (27, 700740), (30, 630666), (34, 556470), (36, 525555), (45, 420444), (51, 370980), (54, 350370), (60, 315333), (68, 278235), (81, 233580), (85, 222588), (90, 210222), (102, 185490), (108, 175185), (135, 140148), (153, 123660), (162, 116790), (170, 111294), (180, 105111), (204, 92745), (229, 82620), (243, 77860), (255, 74196), (270, 70074), (306, 61830), (324, 58395), (340, 55647), (405, 46716), (458, 41310), (459, 41220), (486, 38930), (510, 37098), (540, 35037), (612, 30915), (687, 27540), (765, 24732), (810, 23358), (916, 20655), (918, 20610), (972, 19465), (1020, 18549), (1145, 16524), (1215, 15572), (1374, 13770), (1377, 13740), (1530, 12366), (1620, 11679), (1836, 10305), (2061, 9180), (2290, 8262), (2295, 8244), (2430, 7786), (2748, 6885), (2754, 6870), (3060, 6183), (3435, 5508), (3893, 4860), (4122, 4590), (4131, 4580)]