20004975

素因数分解:

$3^5\times 5^2\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:151

約数の個数: 72

約数和(自身を含む): 38591280

約数和(自身を除く): 18586305

約数列:

[1, 3, 5, 9, 15, 25, 27, 37, 45, 75, 81, 89, 111, 135, 185, 225, 243, 267, 333, 405, 445, 555, 675, 801, 925, 999, 1215, 1335, 1665, 2025, 2225, 2403, 2775, 2997, 3293, 4005, 4995, 6075, 6675, 7209, 8325, 8991, 9879, 12015, 14985, 16465, 20025, 21627, 24975, 29637, 36045, 44955, 49395, 60075, 74925, 82325, 88911, 108135, 148185, 180225, 224775, 246975, 266733, 444555, 540675, 740925, 800199, 1333665, 2222775, 4000995, 6668325, 20004975]

約数ペア:

[(1, 20004975), (3, 6668325), (5, 4000995), (9, 2222775), (15, 1333665), (25, 800199), (27, 740925), (37, 540675), (45, 444555), (75, 266733), (81, 246975), (89, 224775), (111, 180225), (135, 148185), (185, 108135), (225, 88911), (243, 82325), (267, 74925), (333, 60075), (405, 49395), (445, 44955), (555, 36045), (675, 29637), (801, 24975), (925, 21627), (999, 20025), (1215, 16465), (1335, 14985), (1665, 12015), (2025, 9879), (2225, 8991), (2403, 8325), (2775, 7209), (2997, 6675), (3293, 6075), (4005, 4995)]