21497120

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1$

素因数の和:198

約数の個数: 96

約数和(自身を含む): 54295920

約数和(自身を除く): 32798800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 41, 58, 80, 82, 113, 116, 145, 160, 164, 205, 226, 232, 290, 328, 410, 452, 464, 565, 580, 656, 820, 904, 928, 1130, 1160, 1189, 1312, 1640, 1808, 2260, 2320, 2378, 3277, 3280, 3616, 4520, 4633, 4640, 4756, 5945, 6554, 6560, 9040, 9266, 9512, 11890, 13108, 16385, 18080, 18532, 19024, 23165, 23780, 26216, 32770, 37064, 38048, 46330, 47560, 52432, 65540, 74128, 92660, 95120, 104864, 131080, 134357, 148256, 185320, 190240, 262160, 268714, 370640, 524320, 537428, 671785, 741280, 1074856, 1343570, 2149712, 2687140, 4299424, 5374280, 10748560, 21497120]

約数ペア:

[(1, 21497120), (2, 10748560), (4, 5374280), (5, 4299424), (8, 2687140), (10, 2149712), (16, 1343570), (20, 1074856), (29, 741280), (32, 671785), (40, 537428), (41, 524320), (58, 370640), (80, 268714), (82, 262160), (113, 190240), (116, 185320), (145, 148256), (160, 134357), (164, 131080), (205, 104864), (226, 95120), (232, 92660), (290, 74128), (328, 65540), (410, 52432), (452, 47560), (464, 46330), (565, 38048), (580, 37064), (656, 32770), (820, 26216), (904, 23780), (928, 23165), (1130, 19024), (1160, 18532), (1189, 18080), (1312, 16385), (1640, 13108), (1808, 11890), (2260, 9512), (2320, 9266), (2378, 9040), (3277, 6560), (3280, 6554), (3616, 5945), (4520, 4756), (4633, 4640)]