21991760

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{227}}^1$

素因数の和:420

約数の個数: 80

約数和(自身を含む): 59031936

約数和(自身を除く): 37040176

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 173, 227, 280, 346, 454, 560, 692, 865, 908, 1135, 1211, 1384, 1589, 1730, 1816, 2270, 2422, 2768, 3178, 3460, 3632, 4540, 4844, 6055, 6356, 6920, 7945, 9080, 9688, 12110, 12712, 13840, 15890, 18160, 19376, 24220, 25424, 31780, 39271, 48440, 63560, 78542, 96880, 127120, 157084, 196355, 274897, 314168, 392710, 549794, 628336, 785420, 1099588, 1374485, 1570840, 2199176, 2748970, 3141680, 4398352, 5497940, 10995880, 21991760]

約数ペア:

[(1, 21991760), (2, 10995880), (4, 5497940), (5, 4398352), (7, 3141680), (8, 2748970), (10, 2199176), (14, 1570840), (16, 1374485), (20, 1099588), (28, 785420), (35, 628336), (40, 549794), (56, 392710), (70, 314168), (80, 274897), (112, 196355), (140, 157084), (173, 127120), (227, 96880), (280, 78542), (346, 63560), (454, 48440), (560, 39271), (692, 31780), (865, 25424), (908, 24220), (1135, 19376), (1211, 18160), (1384, 15890), (1589, 13840), (1730, 12712), (1816, 12110), (2270, 9688), (2422, 9080), (2768, 7945), (3178, 6920), (3460, 6356), (3632, 6055), (4540, 4844)]