81616520

素因数分解:

$2^3\times 5^1\times {\mathrm{181}}^1\times {\mathrm{11273}}^1$

素因数の和:11465

約数の個数: 32

約数和(自身を含む): 184668120

約数和(自身を除く): 103051600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 181, 362, 724, 905, 1448, 1810, 3620, 7240, 11273, 22546, 45092, 56365, 90184, 112730, 225460, 450920, 2040413, 4080826, 8161652, 10202065, 16323304, 20404130, 40808260, 81616520]

約数ペア:

[(1, 81616520), (2, 40808260), (4, 20404130), (5, 16323304), (8, 10202065), (10, 8161652), (20, 4080826), (40, 2040413), (181, 450920), (362, 225460), (724, 112730), (905, 90184), (1448, 56365), (1810, 45092), (3620, 22546), (7240, 11273)]