399888320

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{991}}^1$

素因数の和:1118

約数の個数: 112

約数和(自身を含む): 1037100288

約数和(自身を除く): 637211968

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 97, 104, 130, 160, 194, 208, 260, 320, 388, 416, 485, 520, 776, 832, 970, 991, 1040, 1261, 1552, 1940, 1982, 2080, 2522, 3104, 3880, 3964, 4160, 4955, 5044, 6208, 6305, 7760, 7928, 9910, 10088, 12610, 12883, 15520, 15856, 19820, 20176, 25220, 25766, 31040, 31712, 39640, 40352, 50440, 51532, 63424, 64415, 79280, 80704, 96127, 100880, 103064, 128830, 158560, 192254, 201760, 206128, 257660, 317120, 384508, 403520, 412256, 480635, 515320, 769016, 824512, 961270, 1030640, 1249651, 1538032, 1922540, 2061280, 2499302, 3076064, 3845080, 4122560, 4998604, 6152128, 6248255, 7690160, 9997208, 12496510, 15380320, 19994416, 24993020, 30760640, 39988832, 49986040, 79977664, 99972080, 199944160, 399888320]

約数ペア:

[(1, 399888320), (2, 199944160), (4, 99972080), (5, 79977664), (8, 49986040), (10, 39988832), (13, 30760640), (16, 24993020), (20, 19994416), (26, 15380320), (32, 12496510), (40, 9997208), (52, 7690160), (64, 6248255), (65, 6152128), (80, 4998604), (97, 4122560), (104, 3845080), (130, 3076064), (160, 2499302), (194, 2061280), (208, 1922540), (260, 1538032), (320, 1249651), (388, 1030640), (416, 961270), (485, 824512), (520, 769016), (776, 515320), (832, 480635), (970, 412256), (991, 403520), (1040, 384508), (1261, 317120), (1552, 257660), (1940, 206128), (1982, 201760), (2080, 192254), (2522, 158560), (3104, 128830), (3880, 103064), (3964, 100880), (4160, 96127), (4955, 80704), (5044, 79280), (6208, 64415), (6305, 63424), (7760, 51532), (7928, 50440), (9910, 40352), (10088, 39640), (12610, 31712), (12883, 31040), (15520, 25766), (15856, 25220), (19820, 20176)]