19908105

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{587}}^1$

素因数の和:638

約数の個数: 64

約数和(自身を含む): 40642560

約数和(自身を除く): 20734455

約数列:

[1, 3, 5, 7, 15, 17, 19, 21, 35, 51, 57, 85, 95, 105, 119, 133, 255, 285, 323, 357, 399, 587, 595, 665, 969, 1615, 1761, 1785, 1995, 2261, 2935, 4109, 4845, 6783, 8805, 9979, 11153, 11305, 12327, 20545, 29937, 33459, 33915, 49895, 55765, 61635, 69853, 78071, 149685, 167295, 189601, 209559, 234213, 349265, 390355, 568803, 948005, 1047795, 1171065, 1327207, 2844015, 3981621, 6636035, 19908105]

約数ペア:

[(1, 19908105), (3, 6636035), (5, 3981621), (7, 2844015), (15, 1327207), (17, 1171065), (19, 1047795), (21, 948005), (35, 568803), (51, 390355), (57, 349265), (85, 234213), (95, 209559), (105, 189601), (119, 167295), (133, 149685), (255, 78071), (285, 69853), (323, 61635), (357, 55765), (399, 49895), (587, 33915), (595, 33459), (665, 29937), (969, 20545), (1615, 12327), (1761, 11305), (1785, 11153), (1995, 9979), (2261, 8805), (2935, 6783), (4109, 4845)]