21020480

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{163}}^1$

素因数の和:224

約数の個数: 112

約数和(自身を含む): 55985664

約数和(自身を除く): 34965184

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 130, 155, 160, 163, 208, 248, 260, 310, 320, 326, 403, 416, 496, 520, 620, 652, 806, 815, 832, 992, 1040, 1240, 1304, 1612, 1630, 1984, 2015, 2080, 2119, 2480, 2608, 3224, 3260, 4030, 4160, 4238, 4960, 5053, 5216, 6448, 6520, 8060, 8476, 9920, 10106, 10432, 10595, 12896, 13040, 16120, 16952, 20212, 21190, 25265, 25792, 26080, 32240, 33904, 40424, 42380, 50530, 52160, 64480, 65689, 67808, 80848, 84760, 101060, 128960, 131378, 135616, 161696, 169520, 202120, 262756, 323392, 328445, 339040, 404240, 525512, 656890, 678080, 808480, 1051024, 1313780, 1616960, 2102048, 2627560, 4204096, 5255120, 10510240, 21020480]

約数ペア:

[(1, 21020480), (2, 10510240), (4, 5255120), (5, 4204096), (8, 2627560), (10, 2102048), (13, 1616960), (16, 1313780), (20, 1051024), (26, 808480), (31, 678080), (32, 656890), (40, 525512), (52, 404240), (62, 339040), (64, 328445), (65, 323392), (80, 262756), (104, 202120), (124, 169520), (130, 161696), (155, 135616), (160, 131378), (163, 128960), (208, 101060), (248, 84760), (260, 80848), (310, 67808), (320, 65689), (326, 64480), (403, 52160), (416, 50530), (496, 42380), (520, 40424), (620, 33904), (652, 32240), (806, 26080), (815, 25792), (832, 25265), (992, 21190), (1040, 20212), (1240, 16952), (1304, 16120), (1612, 13040), (1630, 12896), (1984, 10595), (2015, 10432), (2080, 10106), (2119, 9920), (2480, 8476), (2608, 8060), (3224, 6520), (3260, 6448), (4030, 5216), (4160, 5053), (4238, 4960)]