19649775

素因数分解:

$3^1\times 5^2\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 34171424

約数和(自身を除く): 14521649

約数列:

[1, 3, 5, 15, 25, 37, 73, 75, 97, 111, 185, 219, 291, 365, 485, 555, 925, 1095, 1455, 1825, 2425, 2701, 2775, 3589, 5475, 7081, 7275, 8103, 10767, 13505, 17945, 21243, 35405, 40515, 53835, 67525, 89725, 106215, 177025, 202575, 261997, 269175, 531075, 785991, 1309985, 3929955, 6549925, 19649775]

約数ペア:

[(1, 19649775), (3, 6549925), (5, 3929955), (15, 1309985), (25, 785991), (37, 531075), (73, 269175), (75, 261997), (97, 202575), (111, 177025), (185, 106215), (219, 89725), (291, 67525), (365, 53835), (485, 40515), (555, 35405), (925, 21243), (1095, 17945), (1455, 13505), (1825, 10767), (2425, 8103), (2701, 7275), (2775, 7081), (3589, 5475)]