21444020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{1231}}^1$

素因数の和:1320

約数の個数: 48

約数和(自身を含む): 49260288

約数和(自身を除く): 27816268

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1231, 1340, 1742, 2462, 3484, 4355, 4924, 6155, 8710, 12310, 16003, 17420, 24620, 32006, 64012, 80015, 82477, 160030, 164954, 320060, 329908, 412385, 824770, 1072201, 1649540, 2144402, 4288804, 5361005, 10722010, 21444020]

約数ペア:

[(1, 21444020), (2, 10722010), (4, 5361005), (5, 4288804), (10, 2144402), (13, 1649540), (20, 1072201), (26, 824770), (52, 412385), (65, 329908), (67, 320060), (130, 164954), (134, 160030), (260, 82477), (268, 80015), (335, 64012), (670, 32006), (871, 24620), (1231, 17420), (1340, 16003), (1742, 12310), (2462, 8710), (3484, 6155), (4355, 4924)]