20181720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{761}}^1$

素因数の和:805

約数の個数: 128

約数和(自身を含む): 69128640

約数和(自身を除く): 48946920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 17, 20, 24, 26, 30, 34, 39, 40, 51, 52, 60, 65, 68, 78, 85, 102, 104, 120, 130, 136, 156, 170, 195, 204, 221, 255, 260, 312, 340, 390, 408, 442, 510, 520, 663, 680, 761, 780, 884, 1020, 1105, 1326, 1522, 1560, 1768, 2040, 2210, 2283, 2652, 3044, 3315, 3805, 4420, 4566, 5304, 6088, 6630, 7610, 8840, 9132, 9893, 11415, 12937, 13260, 15220, 18264, 19786, 22830, 25874, 26520, 29679, 30440, 38811, 39572, 45660, 49465, 51748, 59358, 64685, 77622, 79144, 91320, 98930, 103496, 118716, 129370, 148395, 155244, 168181, 194055, 197860, 237432, 258740, 296790, 310488, 336362, 388110, 395720, 504543, 517480, 593580, 672724, 776220, 840905, 1009086, 1187160, 1345448, 1552440, 1681810, 2018172, 2522715, 3363620, 4036344, 5045430, 6727240, 10090860, 20181720]

約数ペア:

[(1, 20181720), (2, 10090860), (3, 6727240), (4, 5045430), (5, 4036344), (6, 3363620), (8, 2522715), (10, 2018172), (12, 1681810), (13, 1552440), (15, 1345448), (17, 1187160), (20, 1009086), (24, 840905), (26, 776220), (30, 672724), (34, 593580), (39, 517480), (40, 504543), (51, 395720), (52, 388110), (60, 336362), (65, 310488), (68, 296790), (78, 258740), (85, 237432), (102, 197860), (104, 194055), (120, 168181), (130, 155244), (136, 148395), (156, 129370), (170, 118716), (195, 103496), (204, 98930), (221, 91320), (255, 79144), (260, 77622), (312, 64685), (340, 59358), (390, 51748), (408, 49465), (442, 45660), (510, 39572), (520, 38811), (663, 30440), (680, 29679), (761, 26520), (780, 25874), (884, 22830), (1020, 19786), (1105, 18264), (1326, 15220), (1522, 13260), (1560, 12937), (1768, 11415), (2040, 9893), (2210, 9132), (2283, 8840), (2652, 7610), (3044, 6630), (3315, 6088), (3805, 5304), (4420, 4566)]