19630325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1$

素因数の和:87

約数の個数: 72

約数和(自身を含む): 31977120

約数和(自身を除く): 12346795

約数列:

[1, 5, 11, 13, 17, 19, 25, 55, 65, 85, 95, 143, 187, 209, 221, 247, 275, 289, 323, 325, 425, 475, 715, 935, 1045, 1105, 1235, 1445, 1615, 2431, 2717, 3179, 3553, 3575, 3757, 4199, 4675, 5225, 5491, 5525, 6175, 7225, 8075, 12155, 13585, 15895, 17765, 18785, 20995, 27455, 41327, 46189, 60401, 60775, 67925, 71383, 79475, 88825, 93925, 104975, 137275, 206635, 230945, 302005, 356915, 785213, 1033175, 1154725, 1510025, 1784575, 3926065, 19630325]

約数ペア:

[(1, 19630325), (5, 3926065), (11, 1784575), (13, 1510025), (17, 1154725), (19, 1033175), (25, 785213), (55, 356915), (65, 302005), (85, 230945), (95, 206635), (143, 137275), (187, 104975), (209, 93925), (221, 88825), (247, 79475), (275, 71383), (289, 67925), (323, 60775), (325, 60401), (425, 46189), (475, 41327), (715, 27455), (935, 20995), (1045, 18785), (1105, 17765), (1235, 15895), (1445, 13585), (1615, 12155), (2431, 8075), (2717, 7225), (3179, 6175), (3553, 5525), (3575, 5491), (3757, 5225), (4199, 4675)]