2018997890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{31249}}^1$

素因数の和:31347

約数の個数: 64

約数和(自身を含む): 4536000000

約数和(自身を除く): 2517002110

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 71, 91, 130, 142, 182, 355, 455, 497, 710, 910, 923, 994, 1846, 2485, 4615, 4970, 6461, 9230, 12922, 31249, 32305, 62498, 64610, 156245, 218743, 312490, 406237, 437486, 812474, 1093715, 2031185, 2187430, 2218679, 2843659, 4062370, 4437358, 5687318, 11093395, 14218295, 15530753, 22186790, 28436590, 28842827, 31061506, 57685654, 77653765, 144214135, 155307530, 201899789, 288428270, 403799578, 1009498945, 2018997890]

約数ペア:

[(1, 2018997890), (2, 1009498945), (5, 403799578), (7, 288428270), (10, 201899789), (13, 155307530), (14, 144214135), (26, 77653765), (35, 57685654), (65, 31061506), (70, 28842827), (71, 28436590), (91, 22186790), (130, 15530753), (142, 14218295), (182, 11093395), (355, 5687318), (455, 4437358), (497, 4062370), (710, 2843659), (910, 2218679), (923, 2187430), (994, 2031185), (1846, 1093715), (2485, 812474), (4615, 437486), (4970, 406237), (6461, 312490), (9230, 218743), (12922, 156245), (31249, 64610), (32305, 62498)]