18705440

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^2$

素因数の和:91

約数の個数: 144

約数和(自身を含む): 52676568

約数和(自身を除く): 33971128

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 23, 26, 32, 34, 40, 46, 52, 65, 68, 80, 85, 92, 104, 115, 130, 136, 160, 170, 184, 208, 221, 230, 260, 272, 299, 340, 368, 391, 416, 442, 460, 520, 529, 544, 598, 680, 736, 782, 884, 920, 1040, 1058, 1105, 1196, 1360, 1495, 1564, 1768, 1840, 1955, 2080, 2116, 2210, 2392, 2645, 2720, 2990, 3128, 3536, 3680, 3910, 4232, 4420, 4784, 5083, 5290, 5980, 6256, 6877, 7072, 7820, 8464, 8840, 8993, 9568, 10166, 10580, 11960, 12512, 13754, 15640, 16928, 17680, 17986, 20332, 21160, 23920, 25415, 27508, 31280, 34385, 35360, 35972, 40664, 42320, 44965, 47840, 50830, 55016, 62560, 68770, 71944, 81328, 84640, 89930, 101660, 110032, 116909, 137540, 143888, 162656, 179860, 203320, 220064, 233818, 275080, 287776, 359720, 406640, 467636, 550160, 584545, 719440, 813280, 935272, 1100320, 1169090, 1438880, 1870544, 2338180, 3741088, 4676360, 9352720, 18705440]

約数ペア:

[(1, 18705440), (2, 9352720), (4, 4676360), (5, 3741088), (8, 2338180), (10, 1870544), (13, 1438880), (16, 1169090), (17, 1100320), (20, 935272), (23, 813280), (26, 719440), (32, 584545), (34, 550160), (40, 467636), (46, 406640), (52, 359720), (65, 287776), (68, 275080), (80, 233818), (85, 220064), (92, 203320), (104, 179860), (115, 162656), (130, 143888), (136, 137540), (160, 116909), (170, 110032), (184, 101660), (208, 89930), (221, 84640), (230, 81328), (260, 71944), (272, 68770), (299, 62560), (340, 55016), (368, 50830), (391, 47840), (416, 44965), (442, 42320), (460, 40664), (520, 35972), (529, 35360), (544, 34385), (598, 31280), (680, 27508), (736, 25415), (782, 23920), (884, 21160), (920, 20332), (1040, 17986), (1058, 17680), (1105, 16928), (1196, 15640), (1360, 13754), (1495, 12512), (1564, 11960), (1768, 10580), (1840, 10166), (1955, 9568), (2080, 8993), (2116, 8840), (2210, 8464), (2392, 7820), (2645, 7072), (2720, 6877), (2990, 6256), (3128, 5980), (3536, 5290), (3680, 5083), (3910, 4784), (4232, 4420)]