21227390

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:197

約数の個数: 64

約数和(自身を含む): 43390080

約数和(自身を除く): 22162690

約数列:

[1, 2, 5, 10, 17, 23, 34, 46, 61, 85, 89, 115, 122, 170, 178, 230, 305, 391, 445, 610, 782, 890, 1037, 1403, 1513, 1955, 2047, 2074, 2806, 3026, 3910, 4094, 5185, 5429, 7015, 7565, 10235, 10370, 10858, 14030, 15130, 20470, 23851, 27145, 34799, 47702, 54290, 69598, 92293, 119255, 124867, 173995, 184586, 238510, 249734, 347990, 461465, 624335, 922930, 1248670, 2122739, 4245478, 10613695, 21227390]

約数ペア:

[(1, 21227390), (2, 10613695), (5, 4245478), (10, 2122739), (17, 1248670), (23, 922930), (34, 624335), (46, 461465), (61, 347990), (85, 249734), (89, 238510), (115, 184586), (122, 173995), (170, 124867), (178, 119255), (230, 92293), (305, 69598), (391, 54290), (445, 47702), (610, 34799), (782, 27145), (890, 23851), (1037, 20470), (1403, 15130), (1513, 14030), (1955, 10858), (2047, 10370), (2074, 10235), (2806, 7565), (3026, 7015), (3910, 5429), (4094, 5185)]