20985952

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{827}}^1$

素因数の和:911

約数の個数: 48

約数和(自身を含む): 45278352

約数和(自身を除く): 24292400

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 61, 104, 122, 208, 244, 416, 488, 793, 827, 976, 1586, 1654, 1952, 3172, 3308, 6344, 6616, 10751, 12688, 13232, 21502, 25376, 26464, 43004, 50447, 86008, 100894, 172016, 201788, 344032, 403576, 655811, 807152, 1311622, 1614304, 2623244, 5246488, 10492976, 20985952]

約数ペア:

[(1, 20985952), (2, 10492976), (4, 5246488), (8, 2623244), (13, 1614304), (16, 1311622), (26, 807152), (32, 655811), (52, 403576), (61, 344032), (104, 201788), (122, 172016), (208, 100894), (244, 86008), (416, 50447), (488, 43004), (793, 26464), (827, 25376), (976, 21502), (1586, 13232), (1654, 12688), (1952, 10751), (3172, 6616), (3308, 6344)]