21890650

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{487}}^1$

素因数の和:559

約数の個数: 48

約数和(自身を含む): 43568640

約数和(自身を除く): 21677990

約数列:

[1, 2, 5, 10, 25, 29, 31, 50, 58, 62, 145, 155, 290, 310, 487, 725, 775, 899, 974, 1450, 1550, 1798, 2435, 4495, 4870, 8990, 12175, 14123, 15097, 22475, 24350, 28246, 30194, 44950, 70615, 75485, 141230, 150970, 353075, 377425, 437813, 706150, 754850, 875626, 2189065, 4378130, 10945325, 21890650]

約数ペア:

[(1, 21890650), (2, 10945325), (5, 4378130), (10, 2189065), (25, 875626), (29, 754850), (31, 706150), (50, 437813), (58, 377425), (62, 353075), (145, 150970), (155, 141230), (290, 75485), (310, 70615), (487, 44950), (725, 30194), (775, 28246), (899, 24350), (974, 22475), (1450, 15097), (1550, 14123), (1798, 12175), (2435, 8990), (4495, 4870)]