280111975

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{419}}^1$

素因数の和:481

約数の個数: 72

約数和(自身を含む): 436378320

約数和(自身を除く): 156266345

約数列:

[1, 5, 11, 13, 17, 25, 55, 65, 85, 121, 143, 187, 221, 275, 325, 419, 425, 605, 715, 935, 1105, 1573, 2057, 2095, 2431, 3025, 3575, 4609, 4675, 5447, 5525, 7123, 7865, 10285, 10475, 12155, 23045, 26741, 27235, 35615, 39325, 50699, 51425, 59917, 60775, 78353, 92599, 115225, 133705, 136175, 178075, 253495, 299585, 391765, 462995, 659087, 668525, 861883, 1018589, 1267475, 1497925, 1958825, 2314975, 3295435, 4309415, 5092945, 11204479, 16477175, 21547075, 25464725, 56022395, 280111975]

約数ペア:

[(1, 280111975), (5, 56022395), (11, 25464725), (13, 21547075), (17, 16477175), (25, 11204479), (55, 5092945), (65, 4309415), (85, 3295435), (121, 2314975), (143, 1958825), (187, 1497925), (221, 1267475), (275, 1018589), (325, 861883), (419, 668525), (425, 659087), (605, 462995), (715, 391765), (935, 299585), (1105, 253495), (1573, 178075), (2057, 136175), (2095, 133705), (2431, 115225), (3025, 92599), (3575, 78353), (4609, 60775), (4675, 59917), (5447, 51425), (5525, 50699), (7123, 39325), (7865, 35615), (10285, 27235), (10475, 26741), (12155, 23045)]