20539920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^2$

素因数の和:161

約数の個数: 120

約数和(自身を含む): 67549248

約数和(自身を除く): 47009328

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 40, 46, 48, 60, 61, 69, 80, 92, 115, 120, 122, 138, 183, 184, 230, 240, 244, 276, 305, 345, 366, 368, 460, 488, 552, 610, 690, 732, 915, 920, 976, 1104, 1220, 1380, 1403, 1464, 1830, 1840, 2440, 2760, 2806, 2928, 3660, 3721, 4209, 4880, 5520, 5612, 7015, 7320, 7442, 8418, 11163, 11224, 14030, 14640, 14884, 16836, 18605, 21045, 22326, 22448, 28060, 29768, 33672, 37210, 42090, 44652, 55815, 56120, 59536, 67344, 74420, 84180, 85583, 89304, 111630, 112240, 148840, 168360, 171166, 178608, 223260, 256749, 297680, 336720, 342332, 427915, 446520, 513498, 684664, 855830, 893040, 1026996, 1283745, 1369328, 1711660, 2053992, 2567490, 3423320, 4107984, 5134980, 6846640, 10269960, 20539920]

約数ペア:

[(1, 20539920), (2, 10269960), (3, 6846640), (4, 5134980), (5, 4107984), (6, 3423320), (8, 2567490), (10, 2053992), (12, 1711660), (15, 1369328), (16, 1283745), (20, 1026996), (23, 893040), (24, 855830), (30, 684664), (40, 513498), (46, 446520), (48, 427915), (60, 342332), (61, 336720), (69, 297680), (80, 256749), (92, 223260), (115, 178608), (120, 171166), (122, 168360), (138, 148840), (183, 112240), (184, 111630), (230, 89304), (240, 85583), (244, 84180), (276, 74420), (305, 67344), (345, 59536), (366, 56120), (368, 55815), (460, 44652), (488, 42090), (552, 37210), (610, 33672), (690, 29768), (732, 28060), (915, 22448), (920, 22326), (976, 21045), (1104, 18605), (1220, 16836), (1380, 14884), (1403, 14640), (1464, 14030), (1830, 11224), (1840, 11163), (2440, 8418), (2760, 7442), (2806, 7320), (2928, 7015), (3660, 5612), (3721, 5520), (4209, 4880)]