21425780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 51438240

約数和(自身を除く): 30012460

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 34, 41, 53, 58, 68, 82, 85, 106, 116, 145, 164, 170, 205, 212, 265, 290, 340, 410, 493, 530, 580, 697, 820, 901, 986, 1060, 1189, 1394, 1537, 1802, 1972, 2173, 2378, 2465, 2788, 3074, 3485, 3604, 4346, 4505, 4756, 4930, 5945, 6148, 6970, 7685, 8692, 9010, 9860, 10865, 11890, 13940, 15370, 18020, 20213, 21730, 23780, 26129, 30740, 36941, 40426, 43460, 52258, 63017, 73882, 80852, 101065, 104516, 126034, 130645, 147764, 184705, 202130, 252068, 261290, 315085, 369410, 404260, 522580, 630170, 738820, 1071289, 1260340, 2142578, 4285156, 5356445, 10712890, 21425780]

約数ペア:

[(1, 21425780), (2, 10712890), (4, 5356445), (5, 4285156), (10, 2142578), (17, 1260340), (20, 1071289), (29, 738820), (34, 630170), (41, 522580), (53, 404260), (58, 369410), (68, 315085), (82, 261290), (85, 252068), (106, 202130), (116, 184705), (145, 147764), (164, 130645), (170, 126034), (205, 104516), (212, 101065), (265, 80852), (290, 73882), (340, 63017), (410, 52258), (493, 43460), (530, 40426), (580, 36941), (697, 30740), (820, 26129), (901, 23780), (986, 21730), (1060, 20213), (1189, 18020), (1394, 15370), (1537, 13940), (1802, 11890), (1972, 10865), (2173, 9860), (2378, 9010), (2465, 8692), (2788, 7685), (3074, 6970), (3485, 6148), (3604, 5945), (4346, 4930), (4505, 4756)]