20664540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{8831}}^1$

素因数の和:8859

約数の個数: 72

約数和(自身を含む): 67511808

約数和(自身を除く): 46847268

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 90, 117, 130, 156, 180, 195, 234, 260, 390, 468, 585, 780, 1170, 2340, 8831, 17662, 26493, 35324, 44155, 52986, 79479, 88310, 105972, 114803, 132465, 158958, 176620, 229606, 264930, 317916, 344409, 397395, 459212, 529860, 574015, 688818, 794790, 1033227, 1148030, 1377636, 1589580, 1722045, 2066454, 2296060, 3444090, 4132908, 5166135, 6888180, 10332270, 20664540]

約数ペア:

[(1, 20664540), (2, 10332270), (3, 6888180), (4, 5166135), (5, 4132908), (6, 3444090), (9, 2296060), (10, 2066454), (12, 1722045), (13, 1589580), (15, 1377636), (18, 1148030), (20, 1033227), (26, 794790), (30, 688818), (36, 574015), (39, 529860), (45, 459212), (52, 397395), (60, 344409), (65, 317916), (78, 264930), (90, 229606), (117, 176620), (130, 158958), (156, 132465), (180, 114803), (195, 105972), (234, 88310), (260, 79479), (390, 52986), (468, 44155), (585, 35324), (780, 26493), (1170, 17662), (2340, 8831)]