21721368

素因数分解:

$2^3\times 3^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{401}}^1$

素因数の和:508

約数の個数: 64

約数和(自身を含む): 56826720

約数和(自身を除く): 35105352

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 37, 61, 74, 111, 122, 148, 183, 222, 244, 296, 366, 401, 444, 488, 732, 802, 888, 1203, 1464, 1604, 2257, 2406, 3208, 4514, 4812, 6771, 9028, 9624, 13542, 14837, 18056, 24461, 27084, 29674, 44511, 48922, 54168, 59348, 73383, 89022, 97844, 118696, 146766, 178044, 195688, 293532, 356088, 587064, 905057, 1810114, 2715171, 3620228, 5430342, 7240456, 10860684, 21721368]

約数ペア:

[(1, 21721368), (2, 10860684), (3, 7240456), (4, 5430342), (6, 3620228), (8, 2715171), (12, 1810114), (24, 905057), (37, 587064), (61, 356088), (74, 293532), (111, 195688), (122, 178044), (148, 146766), (183, 118696), (222, 97844), (244, 89022), (296, 73383), (366, 59348), (401, 54168), (444, 48922), (488, 44511), (732, 29674), (802, 27084), (888, 24461), (1203, 18056), (1464, 14837), (1604, 13542), (2257, 9624), (2406, 9028), (3208, 6771), (4514, 4812)]