21720050

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1$

素因数の和:164

約数の個数: 96

約数和(自身を含む): 49175424

約数和(自身を除く): 27455374

約数列:

[1, 2, 5, 10, 11, 17, 22, 23, 25, 34, 46, 50, 55, 85, 101, 110, 115, 170, 187, 202, 230, 253, 275, 374, 391, 425, 505, 506, 550, 575, 782, 850, 935, 1010, 1111, 1150, 1265, 1717, 1870, 1955, 2222, 2323, 2525, 2530, 3434, 3910, 4301, 4646, 4675, 5050, 5555, 6325, 8585, 8602, 9350, 9775, 11110, 11615, 12650, 17170, 18887, 19550, 21505, 23230, 25553, 27775, 37774, 39491, 42925, 43010, 51106, 55550, 58075, 78982, 85850, 94435, 107525, 116150, 127765, 188870, 197455, 215050, 255530, 394910, 434401, 472175, 638825, 868802, 944350, 987275, 1277650, 1974550, 2172005, 4344010, 10860025, 21720050]

約数ペア:

[(1, 21720050), (2, 10860025), (5, 4344010), (10, 2172005), (11, 1974550), (17, 1277650), (22, 987275), (23, 944350), (25, 868802), (34, 638825), (46, 472175), (50, 434401), (55, 394910), (85, 255530), (101, 215050), (110, 197455), (115, 188870), (170, 127765), (187, 116150), (202, 107525), (230, 94435), (253, 85850), (275, 78982), (374, 58075), (391, 55550), (425, 51106), (505, 43010), (506, 42925), (550, 39491), (575, 37774), (782, 27775), (850, 25553), (935, 23230), (1010, 21505), (1111, 19550), (1150, 18887), (1265, 17170), (1717, 12650), (1870, 11615), (1955, 11110), (2222, 9775), (2323, 9350), (2525, 8602), (2530, 8585), (3434, 6325), (3910, 5555), (4301, 5050), (4646, 4675)]