210901990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{887}}^1$

素因数の和:997

約数の個数: 64

約数和(自身を含む): 429649920

約数和(自身を除く): 218747930

約数列:

[1, 2, 5, 10, 13, 26, 31, 59, 62, 65, 118, 130, 155, 295, 310, 403, 590, 767, 806, 887, 1534, 1774, 1829, 2015, 3658, 3835, 4030, 4435, 7670, 8870, 9145, 11531, 18290, 23062, 23777, 27497, 47554, 52333, 54994, 57655, 104666, 115310, 118885, 137485, 237770, 261665, 274970, 357461, 523330, 680329, 714922, 1360658, 1622323, 1787305, 3244646, 3401645, 3574610, 6803290, 8111615, 16223230, 21090199, 42180398, 105450995, 210901990]

約数ペア:

[(1, 210901990), (2, 105450995), (5, 42180398), (10, 21090199), (13, 16223230), (26, 8111615), (31, 6803290), (59, 3574610), (62, 3401645), (65, 3244646), (118, 1787305), (130, 1622323), (155, 1360658), (295, 714922), (310, 680329), (403, 523330), (590, 357461), (767, 274970), (806, 261665), (887, 237770), (1534, 137485), (1774, 118885), (1829, 115310), (2015, 104666), (3658, 57655), (3835, 54994), (4030, 52333), (4435, 47554), (7670, 27497), (8870, 23777), (9145, 23062), (11531, 18290)]