21881970

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2$

素因数の和:109

約数の個数: 144

約数和(自身を含む): 66920256

約数和(自身を除く): 45038286

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 23, 30, 31, 33, 45, 46, 55, 62, 66, 69, 90, 93, 99, 110, 115, 138, 155, 165, 186, 198, 207, 230, 253, 279, 310, 330, 341, 345, 414, 465, 495, 506, 558, 682, 690, 713, 759, 930, 961, 990, 1023, 1035, 1265, 1395, 1426, 1518, 1705, 1922, 2046, 2070, 2139, 2277, 2530, 2790, 2883, 3069, 3410, 3565, 3795, 4278, 4554, 4805, 5115, 5766, 6138, 6417, 7130, 7590, 7843, 8649, 9610, 10230, 10571, 10695, 11385, 12834, 14415, 15345, 15686, 17298, 21142, 21390, 22103, 22770, 23529, 28830, 30690, 31713, 32085, 39215, 43245, 44206, 47058, 52855, 63426, 64170, 66309, 70587, 78430, 86490, 95139, 105710, 110515, 117645, 132618, 141174, 158565, 190278, 198927, 221030, 235290, 243133, 317130, 331545, 352935, 397854, 475695, 486266, 663090, 705870, 729399, 951390, 994635, 1215665, 1458798, 1989270, 2188197, 2431330, 3646995, 4376394, 7293990, 10940985, 21881970]

約数ペア:

[(1, 21881970), (2, 10940985), (3, 7293990), (5, 4376394), (6, 3646995), (9, 2431330), (10, 2188197), (11, 1989270), (15, 1458798), (18, 1215665), (22, 994635), (23, 951390), (30, 729399), (31, 705870), (33, 663090), (45, 486266), (46, 475695), (55, 397854), (62, 352935), (66, 331545), (69, 317130), (90, 243133), (93, 235290), (99, 221030), (110, 198927), (115, 190278), (138, 158565), (155, 141174), (165, 132618), (186, 117645), (198, 110515), (207, 105710), (230, 95139), (253, 86490), (279, 78430), (310, 70587), (330, 66309), (341, 64170), (345, 63426), (414, 52855), (465, 47058), (495, 44206), (506, 43245), (558, 39215), (682, 32085), (690, 31713), (713, 30690), (759, 28830), (930, 23529), (961, 22770), (990, 22103), (1023, 21390), (1035, 21142), (1265, 17298), (1395, 15686), (1426, 15345), (1518, 14415), (1705, 12834), (1922, 11385), (2046, 10695), (2070, 10571), (2139, 10230), (2277, 9610), (2530, 8649), (2790, 7843), (2883, 7590), (3069, 7130), (3410, 6417), (3565, 6138), (3795, 5766), (4278, 5115), (4554, 4805)]