15821780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{151}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 37384704

約数和(自身を除く): 21562924

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 151, 155, 169, 260, 302, 310, 338, 403, 604, 620, 676, 755, 806, 845, 1510, 1612, 1690, 1963, 2015, 3020, 3380, 3926, 4030, 4681, 5239, 7852, 8060, 9362, 9815, 10478, 18724, 19630, 20956, 23405, 25519, 26195, 39260, 46810, 51038, 52390, 60853, 93620, 102076, 104780, 121706, 127595, 243412, 255190, 304265, 510380, 608530, 791089, 1217060, 1582178, 3164356, 3955445, 7910890, 15821780]

約数ペア:

[(1, 15821780), (2, 7910890), (4, 3955445), (5, 3164356), (10, 1582178), (13, 1217060), (20, 791089), (26, 608530), (31, 510380), (52, 304265), (62, 255190), (65, 243412), (124, 127595), (130, 121706), (151, 104780), (155, 102076), (169, 93620), (260, 60853), (302, 52390), (310, 51038), (338, 46810), (403, 39260), (604, 26195), (620, 25519), (676, 23405), (755, 20956), (806, 19630), (845, 18724), (1510, 10478), (1612, 9815), (1690, 9362), (1963, 8060), (2015, 7852), (3020, 5239), (3380, 4681), (3926, 4030)]