21715740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{541}}^1$

素因数の和:779

約数の個数: 72

約数和(自身を含む): 66288768

約数和(自身を除く): 44573028

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 223, 446, 541, 669, 892, 1082, 1115, 1338, 1623, 2007, 2164, 2230, 2676, 2705, 3246, 3345, 4014, 4460, 4869, 5410, 6492, 6690, 8028, 8115, 9738, 10035, 10820, 13380, 16230, 19476, 20070, 24345, 32460, 40140, 48690, 97380, 120643, 241286, 361929, 482572, 603215, 723858, 1085787, 1206430, 1447716, 1809645, 2171574, 2412860, 3619290, 4343148, 5428935, 7238580, 10857870, 21715740]

約数ペア:

[(1, 21715740), (2, 10857870), (3, 7238580), (4, 5428935), (5, 4343148), (6, 3619290), (9, 2412860), (10, 2171574), (12, 1809645), (15, 1447716), (18, 1206430), (20, 1085787), (30, 723858), (36, 603215), (45, 482572), (60, 361929), (90, 241286), (180, 120643), (223, 97380), (446, 48690), (541, 40140), (669, 32460), (892, 24345), (1082, 20070), (1115, 19476), (1338, 16230), (1623, 13380), (2007, 10820), (2164, 10035), (2230, 9738), (2676, 8115), (2705, 8028), (3246, 6690), (3345, 6492), (4014, 5410), (4460, 4869)]