28075775

素因数分解:

$5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:121

約数の個数: 72

約数和(自身を含む): 45715824

約数和(自身を除く): 17640049

約数列:

[1, 5, 7, 13, 25, 35, 41, 43, 49, 65, 91, 175, 205, 215, 245, 287, 301, 325, 455, 533, 559, 637, 1025, 1075, 1225, 1435, 1505, 1763, 2009, 2107, 2275, 2665, 2795, 3185, 3731, 3913, 7175, 7525, 8815, 10045, 10535, 12341, 13325, 13975, 15925, 18655, 19565, 22919, 26117, 27391, 44075, 50225, 52675, 61705, 86387, 93275, 97825, 114595, 130585, 136955, 160433, 308525, 431935, 572975, 652925, 684775, 802165, 1123031, 2159675, 4010825, 5615155, 28075775]

約数ペア:

[(1, 28075775), (5, 5615155), (7, 4010825), (13, 2159675), (25, 1123031), (35, 802165), (41, 684775), (43, 652925), (49, 572975), (65, 431935), (91, 308525), (175, 160433), (205, 136955), (215, 130585), (245, 114595), (287, 97825), (301, 93275), (325, 86387), (455, 61705), (533, 52675), (559, 50225), (637, 44075), (1025, 27391), (1075, 26117), (1225, 22919), (1435, 19565), (1505, 18655), (1763, 15925), (2009, 13975), (2107, 13325), (2275, 12341), (2665, 10535), (2795, 10045), (3185, 8815), (3731, 7525), (3913, 7175)]