21000906400

素因数分解:

$2^5\times 5^2\times {\mathrm{3907}}^1\times {\mathrm{6719}}^1$

素因数の和:10646

約数の個数: 72

約数和(自身を含む): 51289217280

約数和(自身を除く): 30288310880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800, 3907, 6719, 7814, 13438, 15628, 19535, 26876, 31256, 33595, 39070, 53752, 62512, 67190, 78140, 97675, 107504, 125024, 134380, 156280, 167975, 195350, 215008, 268760, 312560, 335950, 390700, 537520, 625120, 671900, 781400, 1075040, 1343800, 1562800, 2687600, 3125600, 5375200, 26251133, 52502266, 105004532, 131255665, 210009064, 262511330, 420018128, 525022660, 656278325, 840036256, 1050045320, 1312556650, 2100090640, 2625113300, 4200181280, 5250226600, 10500453200, 21000906400]

約数ペア:

[(1, 21000906400), (2, 10500453200), (4, 5250226600), (5, 4200181280), (8, 2625113300), (10, 2100090640), (16, 1312556650), (20, 1050045320), (25, 840036256), (32, 656278325), (40, 525022660), (50, 420018128), (80, 262511330), (100, 210009064), (160, 131255665), (200, 105004532), (400, 52502266), (800, 26251133), (3907, 5375200), (6719, 3125600), (7814, 2687600), (13438, 1562800), (15628, 1343800), (19535, 1075040), (26876, 781400), (31256, 671900), (33595, 625120), (39070, 537520), (53752, 390700), (62512, 335950), (67190, 312560), (78140, 268760), (97675, 215008), (107504, 195350), (125024, 167975), (134380, 156280)]