21161520

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:220

約数の個数: 160

約数和(自身を含む): 74370240

約数和(自身を除く): 53208720

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 45, 48, 54, 60, 72, 80, 90, 97, 101, 108, 120, 135, 144, 180, 194, 202, 216, 240, 270, 291, 303, 360, 388, 404, 432, 485, 505, 540, 582, 606, 720, 776, 808, 873, 909, 970, 1010, 1080, 1164, 1212, 1455, 1515, 1552, 1616, 1746, 1818, 1940, 2020, 2160, 2328, 2424, 2619, 2727, 2910, 3030, 3492, 3636, 3880, 4040, 4365, 4545, 4656, 4848, 5238, 5454, 5820, 6060, 6984, 7272, 7760, 8080, 8730, 9090, 9797, 10476, 10908, 11640, 12120, 13095, 13635, 13968, 14544, 17460, 18180, 19594, 20952, 21816, 23280, 24240, 26190, 27270, 29391, 34920, 36360, 39188, 41904, 43632, 48985, 52380, 54540, 58782, 69840, 72720, 78376, 88173, 97970, 104760, 109080, 117564, 146955, 156752, 176346, 195940, 209520, 218160, 235128, 264519, 293910, 352692, 391880, 440865, 470256, 529038, 587820, 705384, 783760, 881730, 1058076, 1175640, 1322595, 1410768, 1763460, 2116152, 2351280, 2645190, 3526920, 4232304, 5290380, 7053840, 10580760, 21161520]

約数ペア:

[(1, 21161520), (2, 10580760), (3, 7053840), (4, 5290380), (5, 4232304), (6, 3526920), (8, 2645190), (9, 2351280), (10, 2116152), (12, 1763460), (15, 1410768), (16, 1322595), (18, 1175640), (20, 1058076), (24, 881730), (27, 783760), (30, 705384), (36, 587820), (40, 529038), (45, 470256), (48, 440865), (54, 391880), (60, 352692), (72, 293910), (80, 264519), (90, 235128), (97, 218160), (101, 209520), (108, 195940), (120, 176346), (135, 156752), (144, 146955), (180, 117564), (194, 109080), (202, 104760), (216, 97970), (240, 88173), (270, 78376), (291, 72720), (303, 69840), (360, 58782), (388, 54540), (404, 52380), (432, 48985), (485, 43632), (505, 41904), (540, 39188), (582, 36360), (606, 34920), (720, 29391), (776, 27270), (808, 26190), (873, 24240), (909, 23280), (970, 21816), (1010, 20952), (1080, 19594), (1164, 18180), (1212, 17460), (1455, 14544), (1515, 13968), (1552, 13635), (1616, 13095), (1746, 12120), (1818, 11640), (1940, 10908), (2020, 10476), (2160, 9797), (2328, 9090), (2424, 8730), (2619, 8080), (2727, 7760), (2910, 7272), (3030, 6984), (3492, 6060), (3636, 5820), (3880, 5454), (4040, 5238), (4365, 4848), (4545, 4656)]