280528040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{643}}^1\times {\mathrm{839}}^1$

素因数の和:1506

約数の個数: 64

約数和(自身を含む): 681609600

約数和(自身を除く): 401081560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 643, 839, 1286, 1678, 2572, 3215, 3356, 4195, 5144, 6430, 6712, 8359, 8390, 10907, 12860, 16718, 16780, 21814, 25720, 33436, 33560, 41795, 43628, 54535, 66872, 83590, 87256, 109070, 167180, 218140, 334360, 436280, 539477, 1078954, 2157908, 2697385, 4315816, 5394770, 7013201, 10789540, 14026402, 21579080, 28052804, 35066005, 56105608, 70132010, 140264020, 280528040]

約数ペア:

[(1, 280528040), (2, 140264020), (4, 70132010), (5, 56105608), (8, 35066005), (10, 28052804), (13, 21579080), (20, 14026402), (26, 10789540), (40, 7013201), (52, 5394770), (65, 4315816), (104, 2697385), (130, 2157908), (260, 1078954), (520, 539477), (643, 436280), (839, 334360), (1286, 218140), (1678, 167180), (2572, 109070), (3215, 87256), (3356, 83590), (4195, 66872), (5144, 54535), (6430, 43628), (6712, 41795), (8359, 33560), (8390, 33436), (10907, 25720), (12860, 21814), (16718, 16780)]