81386720

素因数分解:

$2^5\times 5^1\times {\mathrm{271}}^1\times {\mathrm{1877}}^1$

素因数の和:2163

約数の個数: 48

約数和(自身を含む): 193088448

約数和(自身を除く): 111701728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 271, 542, 1084, 1355, 1877, 2168, 2710, 3754, 4336, 5420, 7508, 8672, 9385, 10840, 15016, 18770, 21680, 30032, 37540, 43360, 60064, 75080, 150160, 300320, 508667, 1017334, 2034668, 2543335, 4069336, 5086670, 8138672, 10173340, 16277344, 20346680, 40693360, 81386720]

約数ペア:

[(1, 81386720), (2, 40693360), (4, 20346680), (5, 16277344), (8, 10173340), (10, 8138672), (16, 5086670), (20, 4069336), (32, 2543335), (40, 2034668), (80, 1017334), (160, 508667), (271, 300320), (542, 150160), (1084, 75080), (1355, 60064), (1877, 43360), (2168, 37540), (2710, 30032), (3754, 21680), (4336, 18770), (5420, 15016), (7508, 10840), (8672, 9385)]