28161720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{571}}^1$

素因数の和:725

約数の個数: 96

約数和(自身を含む): 92355120

約数和(自身を除く): 64193400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 137, 180, 274, 360, 411, 548, 571, 685, 822, 1096, 1142, 1233, 1370, 1644, 1713, 2055, 2284, 2466, 2740, 2855, 3288, 3426, 4110, 4568, 4932, 5139, 5480, 5710, 6165, 6852, 8220, 8565, 9864, 10278, 11420, 12330, 13704, 16440, 17130, 20556, 22840, 24660, 25695, 34260, 41112, 49320, 51390, 68520, 78227, 102780, 156454, 205560, 234681, 312908, 391135, 469362, 625816, 704043, 782270, 938724, 1173405, 1408086, 1564540, 1877448, 2346810, 2816172, 3129080, 3520215, 4693620, 5632344, 7040430, 9387240, 14080860, 28161720]

約数ペア:

[(1, 28161720), (2, 14080860), (3, 9387240), (4, 7040430), (5, 5632344), (6, 4693620), (8, 3520215), (9, 3129080), (10, 2816172), (12, 2346810), (15, 1877448), (18, 1564540), (20, 1408086), (24, 1173405), (30, 938724), (36, 782270), (40, 704043), (45, 625816), (60, 469362), (72, 391135), (90, 312908), (120, 234681), (137, 205560), (180, 156454), (274, 102780), (360, 78227), (411, 68520), (548, 51390), (571, 49320), (685, 41112), (822, 34260), (1096, 25695), (1142, 24660), (1233, 22840), (1370, 20556), (1644, 17130), (1713, 16440), (2055, 13704), (2284, 12330), (2466, 11420), (2740, 10278), (2855, 9864), (3288, 8565), (3426, 8220), (4110, 6852), (4568, 6165), (4932, 5710), (5139, 5480)]