280178275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{157}}^1$

素因数の和:233

約数の個数: 72

約数和(自身を含む): 421032080

約数和(自身を除く): 140853805

約数列:

[1, 5, 13, 17, 19, 25, 65, 85, 95, 157, 221, 247, 289, 323, 325, 425, 475, 785, 1105, 1235, 1445, 1615, 2041, 2669, 2983, 3757, 3925, 4199, 5491, 5525, 6175, 7225, 8075, 10205, 13345, 14915, 18785, 20995, 27455, 34697, 38779, 45373, 50711, 51025, 66725, 71383, 74575, 93925, 104975, 137275, 173485, 193895, 226865, 253555, 356915, 589849, 659243, 862087, 867425, 969475, 1134325, 1267775, 1784575, 2949245, 3296215, 4310435, 11207131, 14746225, 16481075, 21552175, 56035655, 280178275]

約数ペア:

[(1, 280178275), (5, 56035655), (13, 21552175), (17, 16481075), (19, 14746225), (25, 11207131), (65, 4310435), (85, 3296215), (95, 2949245), (157, 1784575), (221, 1267775), (247, 1134325), (289, 969475), (323, 867425), (325, 862087), (425, 659243), (475, 589849), (785, 356915), (1105, 253555), (1235, 226865), (1445, 193895), (1615, 173485), (2041, 137275), (2669, 104975), (2983, 93925), (3757, 74575), (3925, 71383), (4199, 66725), (5491, 51025), (5525, 50711), (6175, 45373), (7225, 38779), (8075, 34697), (10205, 27455), (13345, 20995), (14915, 18785)]