20687760

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{487}}^1$

素因数の和:565

約数の個数: 120

約数和(自身を含む): 70799040

約数和(自身を除く): 50111280

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 59, 60, 72, 80, 90, 118, 120, 144, 177, 180, 236, 240, 295, 354, 360, 472, 487, 531, 590, 708, 720, 885, 944, 974, 1062, 1180, 1416, 1461, 1770, 1948, 2124, 2360, 2435, 2655, 2832, 2922, 3540, 3896, 4248, 4383, 4720, 4870, 5310, 5844, 7080, 7305, 7792, 8496, 8766, 9740, 10620, 11688, 14160, 14610, 17532, 19480, 21240, 21915, 23376, 28733, 29220, 35064, 38960, 42480, 43830, 57466, 58440, 70128, 86199, 87660, 114932, 116880, 143665, 172398, 175320, 229864, 258597, 287330, 344796, 350640, 430995, 459728, 517194, 574660, 689592, 861990, 1034388, 1149320, 1292985, 1379184, 1723980, 2068776, 2298640, 2585970, 3447960, 4137552, 5171940, 6895920, 10343880, 20687760]

約数ペア:

[(1, 20687760), (2, 10343880), (3, 6895920), (4, 5171940), (5, 4137552), (6, 3447960), (8, 2585970), (9, 2298640), (10, 2068776), (12, 1723980), (15, 1379184), (16, 1292985), (18, 1149320), (20, 1034388), (24, 861990), (30, 689592), (36, 574660), (40, 517194), (45, 459728), (48, 430995), (59, 350640), (60, 344796), (72, 287330), (80, 258597), (90, 229864), (118, 175320), (120, 172398), (144, 143665), (177, 116880), (180, 114932), (236, 87660), (240, 86199), (295, 70128), (354, 58440), (360, 57466), (472, 43830), (487, 42480), (531, 38960), (590, 35064), (708, 29220), (720, 28733), (885, 23376), (944, 21915), (974, 21240), (1062, 19480), (1180, 17532), (1416, 14610), (1461, 14160), (1770, 11688), (1948, 10620), (2124, 9740), (2360, 8766), (2435, 8496), (2655, 7792), (2832, 7305), (2922, 7080), (3540, 5844), (3896, 5310), (4248, 4870), (4383, 4720)]