21404870

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:185

約数の個数: 64

約数和(自身を含む): 43436736

約数和(自身を除く): 22031866

約数列:

[1, 2, 5, 10, 17, 34, 37, 41, 74, 82, 83, 85, 166, 170, 185, 205, 370, 410, 415, 629, 697, 830, 1258, 1394, 1411, 1517, 2822, 3034, 3071, 3145, 3403, 3485, 6142, 6290, 6806, 6970, 7055, 7585, 14110, 15170, 15355, 17015, 25789, 30710, 34030, 51578, 52207, 57851, 104414, 115702, 125911, 128945, 251822, 257890, 261035, 289255, 522070, 578510, 629555, 1259110, 2140487, 4280974, 10702435, 21404870]

約数ペア:

[(1, 21404870), (2, 10702435), (5, 4280974), (10, 2140487), (17, 1259110), (34, 629555), (37, 578510), (41, 522070), (74, 289255), (82, 261035), (83, 257890), (85, 251822), (166, 128945), (170, 125911), (185, 115702), (205, 104414), (370, 57851), (410, 52207), (415, 51578), (629, 34030), (697, 30710), (830, 25789), (1258, 17015), (1394, 15355), (1411, 15170), (1517, 14110), (2822, 7585), (3034, 7055), (3071, 6970), (3145, 6806), (3403, 6290), (3485, 6142)]