21694280

素因数分解:

$2^3\times 5^1\times {\mathrm{659}}^1\times {\mathrm{823}}^1$

素因数の和:1493

約数の個数: 32

約数和(自身を含む): 48945600

約数和(自身を除く): 27251320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 659, 823, 1318, 1646, 2636, 3292, 3295, 4115, 5272, 6584, 6590, 8230, 13180, 16460, 26360, 32920, 542357, 1084714, 2169428, 2711785, 4338856, 5423570, 10847140, 21694280]

約数ペア:

[(1, 21694280), (2, 10847140), (4, 5423570), (5, 4338856), (8, 2711785), (10, 2169428), (20, 1084714), (40, 542357), (659, 32920), (823, 26360), (1318, 16460), (1646, 13180), (2636, 8230), (3292, 6590), (3295, 6584), (4115, 5272)]