128126840

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{52511}}^1$

素因数の和:52583

約数の個数: 32

約数和(自身を含む): 293016960

約数和(自身を除く): 164890120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 52511, 105022, 210044, 262555, 420088, 525110, 1050220, 2100440, 3203171, 6406342, 12812684, 16015855, 25625368, 32031710, 64063420, 128126840]

約数ペア:

[(1, 128126840), (2, 64063420), (4, 32031710), (5, 25625368), (8, 16015855), (10, 12812684), (20, 6406342), (40, 3203171), (61, 2100440), (122, 1050220), (244, 525110), (305, 420088), (488, 262555), (610, 210044), (1220, 105022), (2440, 52511)]