815163440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{111973}}^1$

素因数の和:112006

約数の個数: 80

約数和(自身を含む): 2332642368

約数和(自身を除く): 1517478928

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 3640, 7280, 111973, 223946, 447892, 559865, 783811, 895784, 1119730, 1455649, 1567622, 1791568, 2239460, 2911298, 3135244, 3919055, 4478920, 5822596, 6270488, 7278245, 7838110, 8957840, 10189543, 11645192, 12540976, 14556490, 15676220, 20379086, 23290384, 29112980, 31352440, 40758172, 50947715, 58225960, 62704880, 81516344, 101895430, 116451920, 163032688, 203790860, 407581720, 815163440]

約数ペア:

[(1, 815163440), (2, 407581720), (4, 203790860), (5, 163032688), (7, 116451920), (8, 101895430), (10, 81516344), (13, 62704880), (14, 58225960), (16, 50947715), (20, 40758172), (26, 31352440), (28, 29112980), (35, 23290384), (40, 20379086), (52, 15676220), (56, 14556490), (65, 12540976), (70, 11645192), (80, 10189543), (91, 8957840), (104, 7838110), (112, 7278245), (130, 6270488), (140, 5822596), (182, 4478920), (208, 3919055), (260, 3135244), (280, 2911298), (364, 2239460), (455, 1791568), (520, 1567622), (560, 1455649), (728, 1119730), (910, 895784), (1040, 783811), (1456, 559865), (1820, 447892), (3640, 223946), (7280, 111973)]