19997383904

素因数分解:

$2^5\times {\mathrm{157}}^1\times {\mathrm{181}}^1\times {\mathrm{21991}}^1$

素因数の和:22339

約数の個数: 48

約数和(自身を含む): 39841322976

約数和(自身を除く): 19843939072

約数列:

[1, 2, 4, 8, 16, 32, 157, 181, 314, 362, 628, 724, 1256, 1448, 2512, 2896, 5024, 5792, 21991, 28417, 43982, 56834, 87964, 113668, 175928, 227336, 351856, 454672, 703712, 909344, 3452587, 3980371, 6905174, 7960742, 13810348, 15921484, 27620696, 31842968, 55241392, 63685936, 110482784, 127371872, 624918247, 1249836494, 2499672988, 4999345976, 9998691952, 19997383904]

約数ペア:

[(1, 19997383904), (2, 9998691952), (4, 4999345976), (8, 2499672988), (16, 1249836494), (32, 624918247), (157, 127371872), (181, 110482784), (314, 63685936), (362, 55241392), (628, 31842968), (724, 27620696), (1256, 15921484), (1448, 13810348), (2512, 7960742), (2896, 6905174), (5024, 3980371), (5792, 3452587), (21991, 909344), (28417, 703712), (43982, 454672), (56834, 351856), (87964, 227336), (113668, 175928)]