18161820

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:162

約数の個数: 144

約数和(自身を含む): 59256288

約数和(自身を除く): 41094468

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 37, 45, 54, 60, 74, 81, 90, 101, 108, 111, 135, 148, 162, 180, 185, 202, 222, 243, 270, 303, 324, 333, 370, 404, 405, 444, 486, 505, 540, 555, 606, 666, 740, 810, 909, 972, 999, 1010, 1110, 1212, 1215, 1332, 1515, 1620, 1665, 1818, 1998, 2020, 2220, 2430, 2727, 2997, 3030, 3330, 3636, 3737, 3996, 4545, 4860, 4995, 5454, 5994, 6060, 6660, 7474, 8181, 8991, 9090, 9990, 10908, 11211, 11988, 13635, 14948, 14985, 16362, 17982, 18180, 18685, 19980, 22422, 24543, 27270, 29970, 32724, 33633, 35964, 37370, 40905, 44844, 44955, 49086, 54540, 56055, 59940, 67266, 74740, 81810, 89910, 98172, 100899, 112110, 122715, 134532, 163620, 168165, 179820, 201798, 224220, 245430, 302697, 336330, 403596, 490860, 504495, 605394, 672660, 908091, 1008990, 1210788, 1513485, 1816182, 2017980, 3026970, 3632364, 4540455, 6053940, 9080910, 18161820]

約数ペア:

[(1, 18161820), (2, 9080910), (3, 6053940), (4, 4540455), (5, 3632364), (6, 3026970), (9, 2017980), (10, 1816182), (12, 1513485), (15, 1210788), (18, 1008990), (20, 908091), (27, 672660), (30, 605394), (36, 504495), (37, 490860), (45, 403596), (54, 336330), (60, 302697), (74, 245430), (81, 224220), (90, 201798), (101, 179820), (108, 168165), (111, 163620), (135, 134532), (148, 122715), (162, 112110), (180, 100899), (185, 98172), (202, 89910), (222, 81810), (243, 74740), (270, 67266), (303, 59940), (324, 56055), (333, 54540), (370, 49086), (404, 44955), (405, 44844), (444, 40905), (486, 37370), (505, 35964), (540, 33633), (555, 32724), (606, 29970), (666, 27270), (740, 24543), (810, 22422), (909, 19980), (972, 18685), (999, 18180), (1010, 17982), (1110, 16362), (1212, 14985), (1215, 14948), (1332, 13635), (1515, 11988), (1620, 11211), (1665, 10908), (1818, 9990), (1998, 9090), (2020, 8991), (2220, 8181), (2430, 7474), (2727, 6660), (2997, 6060), (3030, 5994), (3330, 5454), (3636, 4995), (3737, 4860), (3996, 4545)]