90385840

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{15913}}^1$

素因数の和:15997

約数の個数: 40

約数和(自身を含む): 213120288

約数和(自身を除く): 122734448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 5680, 15913, 31826, 63652, 79565, 127304, 159130, 254608, 318260, 636520, 1129823, 1273040, 2259646, 4519292, 5649115, 9038584, 11298230, 18077168, 22596460, 45192920, 90385840]

約数ペア:

[(1, 90385840), (2, 45192920), (4, 22596460), (5, 18077168), (8, 11298230), (10, 9038584), (16, 5649115), (20, 4519292), (40, 2259646), (71, 1273040), (80, 1129823), (142, 636520), (284, 318260), (355, 254608), (568, 159130), (710, 127304), (1136, 79565), (1420, 63652), (2840, 31826), (5680, 15913)]