20656440

素因数分解:

$2^3\times 3^2\times 5^1\times 7^2\times {\mathrm{1171}}^1$

素因数の和:1202

約数の個数: 144

約数和(自身を含む): 78160680

約数和(自身を除く): 57504240

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 49, 56, 60, 63, 70, 72, 84, 90, 98, 105, 120, 126, 140, 147, 168, 180, 196, 210, 245, 252, 280, 294, 315, 360, 392, 420, 441, 490, 504, 588, 630, 735, 840, 882, 980, 1171, 1176, 1260, 1470, 1764, 1960, 2205, 2342, 2520, 2940, 3513, 3528, 4410, 4684, 5855, 5880, 7026, 8197, 8820, 9368, 10539, 11710, 14052, 16394, 17565, 17640, 21078, 23420, 24591, 28104, 32788, 35130, 40985, 42156, 46840, 49182, 52695, 57379, 65576, 70260, 73773, 81970, 84312, 98364, 105390, 114758, 122955, 140520, 147546, 163940, 172137, 196728, 210780, 229516, 245910, 286895, 295092, 327880, 344274, 368865, 421560, 459032, 491820, 516411, 573790, 590184, 688548, 737730, 860685, 983640, 1032822, 1147580, 1377096, 1475460, 1721370, 2065644, 2295160, 2582055, 2950920, 3442740, 4131288, 5164110, 6885480, 10328220, 20656440]

約数ペア:

[(1, 20656440), (2, 10328220), (3, 6885480), (4, 5164110), (5, 4131288), (6, 3442740), (7, 2950920), (8, 2582055), (9, 2295160), (10, 2065644), (12, 1721370), (14, 1475460), (15, 1377096), (18, 1147580), (20, 1032822), (21, 983640), (24, 860685), (28, 737730), (30, 688548), (35, 590184), (36, 573790), (40, 516411), (42, 491820), (45, 459032), (49, 421560), (56, 368865), (60, 344274), (63, 327880), (70, 295092), (72, 286895), (84, 245910), (90, 229516), (98, 210780), (105, 196728), (120, 172137), (126, 163940), (140, 147546), (147, 140520), (168, 122955), (180, 114758), (196, 105390), (210, 98364), (245, 84312), (252, 81970), (280, 73773), (294, 70260), (315, 65576), (360, 57379), (392, 52695), (420, 49182), (441, 46840), (490, 42156), (504, 40985), (588, 35130), (630, 32788), (735, 28104), (840, 24591), (882, 23420), (980, 21078), (1171, 17640), (1176, 17565), (1260, 16394), (1470, 14052), (1764, 11710), (1960, 10539), (2205, 9368), (2342, 8820), (2520, 8197), (2940, 7026), (3513, 5880), (3528, 5855), (4410, 4684)]