21000751875

素因数分解:

$3^3\times 5^4\times {\mathrm{617}}^1\times {\mathrm{2017}}^1$

素因数の和:2663

約数の個数: 80

約数和(自身を含む): 38960153760

約数和(自身を除く): 17959401885

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 125, 135, 225, 375, 617, 625, 675, 1125, 1851, 1875, 2017, 3085, 3375, 5553, 5625, 6051, 9255, 10085, 15425, 16659, 16875, 18153, 27765, 30255, 46275, 50425, 54459, 77125, 83295, 90765, 138825, 151275, 231375, 252125, 272295, 385625, 416475, 453825, 694125, 756375, 1156875, 1244489, 1260625, 1361475, 2082375, 2269125, 3470625, 3733467, 3781875, 6222445, 6807375, 10411875, 11200401, 11345625, 18667335, 31112225, 33601203, 34036875, 56002005, 93336675, 155561125, 168006015, 280010025, 466683375, 777805625, 840030075, 1400050125, 2333416875, 4200150375, 7000250625, 21000751875]

約数ペア:

[(1, 21000751875), (3, 7000250625), (5, 4200150375), (9, 2333416875), (15, 1400050125), (25, 840030075), (27, 777805625), (45, 466683375), (75, 280010025), (125, 168006015), (135, 155561125), (225, 93336675), (375, 56002005), (617, 34036875), (625, 33601203), (675, 31112225), (1125, 18667335), (1851, 11345625), (1875, 11200401), (2017, 10411875), (3085, 6807375), (3375, 6222445), (5553, 3781875), (5625, 3733467), (6051, 3470625), (9255, 2269125), (10085, 2082375), (15425, 1361475), (16659, 1260625), (16875, 1244489), (18153, 1156875), (27765, 756375), (30255, 694125), (46275, 453825), (50425, 416475), (54459, 385625), (77125, 272295), (83295, 252125), (90765, 231375), (138825, 151275)]