21597975

素因数分解:

$3^3\times 5^2\times 7^2\times {\mathrm{653}}^1$

素因数の和:686

約数の個数: 72

約数和(自身を含む): 46224720

約数和(自身を除く): 24626745

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 35, 45, 49, 63, 75, 105, 135, 147, 175, 189, 225, 245, 315, 441, 525, 653, 675, 735, 945, 1225, 1323, 1575, 1959, 2205, 3265, 3675, 4571, 4725, 5877, 6615, 9795, 11025, 13713, 16325, 17631, 22855, 29385, 31997, 33075, 41139, 48975, 68565, 88155, 95991, 114275, 123417, 146925, 159985, 205695, 287973, 342825, 440775, 479955, 617085, 799925, 863919, 1028475, 1439865, 2399775, 3085425, 4319595, 7199325, 21597975]

約数ペア:

[(1, 21597975), (3, 7199325), (5, 4319595), (7, 3085425), (9, 2399775), (15, 1439865), (21, 1028475), (25, 863919), (27, 799925), (35, 617085), (45, 479955), (49, 440775), (63, 342825), (75, 287973), (105, 205695), (135, 159985), (147, 146925), (175, 123417), (189, 114275), (225, 95991), (245, 88155), (315, 68565), (441, 48975), (525, 41139), (653, 33075), (675, 31997), (735, 29385), (945, 22855), (1225, 17631), (1323, 16325), (1575, 13713), (1959, 11025), (2205, 9795), (3265, 6615), (3675, 5877), (4571, 4725)]