21510580

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{223}}^1$

素因数の和:305

約数の個数: 96

約数和(自身を含む): 56899584

約数和(自身を除く): 35389004

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 53, 65, 70, 91, 106, 130, 140, 182, 212, 223, 260, 265, 364, 371, 446, 455, 530, 689, 742, 892, 910, 1060, 1115, 1378, 1484, 1561, 1820, 1855, 2230, 2756, 2899, 3122, 3445, 3710, 4460, 4823, 5798, 6244, 6890, 7420, 7805, 9646, 11596, 11819, 13780, 14495, 15610, 19292, 20293, 23638, 24115, 28990, 31220, 40586, 47276, 48230, 57980, 59095, 81172, 82733, 96460, 101465, 118190, 153647, 165466, 202930, 236380, 307294, 330932, 405860, 413665, 614588, 768235, 827330, 1075529, 1536470, 1654660, 2151058, 3072940, 4302116, 5377645, 10755290, 21510580]

約数ペア:

[(1, 21510580), (2, 10755290), (4, 5377645), (5, 4302116), (7, 3072940), (10, 2151058), (13, 1654660), (14, 1536470), (20, 1075529), (26, 827330), (28, 768235), (35, 614588), (52, 413665), (53, 405860), (65, 330932), (70, 307294), (91, 236380), (106, 202930), (130, 165466), (140, 153647), (182, 118190), (212, 101465), (223, 96460), (260, 82733), (265, 81172), (364, 59095), (371, 57980), (446, 48230), (455, 47276), (530, 40586), (689, 31220), (742, 28990), (892, 24115), (910, 23638), (1060, 20293), (1115, 19292), (1378, 15610), (1484, 14495), (1561, 13780), (1820, 11819), (1855, 11596), (2230, 9646), (2756, 7805), (2899, 7420), (3122, 6890), (3445, 6244), (3710, 5798), (4460, 4823)]