20931820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:120

約数の個数: 144

約数和(自身を含む): 57915648

約数和(自身を除く): 36983828

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 31, 35, 49, 52, 53, 62, 65, 70, 91, 98, 106, 124, 130, 140, 155, 182, 196, 212, 217, 245, 260, 265, 310, 364, 371, 403, 434, 455, 490, 530, 620, 637, 689, 742, 806, 868, 910, 980, 1060, 1085, 1274, 1378, 1484, 1519, 1612, 1643, 1820, 1855, 2015, 2170, 2548, 2597, 2756, 2821, 3038, 3185, 3286, 3445, 3710, 4030, 4340, 4823, 5194, 5642, 6076, 6370, 6572, 6890, 7420, 7595, 8060, 8215, 9646, 10388, 11284, 11501, 12740, 12985, 13780, 14105, 15190, 16430, 19292, 19747, 21359, 23002, 24115, 25970, 28210, 30380, 32860, 33761, 39494, 42718, 46004, 48230, 51940, 56420, 57505, 67522, 78988, 80507, 85436, 96460, 98735, 106795, 115010, 135044, 149513, 161014, 168805, 197470, 213590, 230020, 299026, 322028, 337610, 394940, 402535, 427180, 598052, 675220, 747565, 805070, 1046591, 1495130, 1610140, 2093182, 2990260, 4186364, 5232955, 10465910, 20931820]

約数ペア:

[(1, 20931820), (2, 10465910), (4, 5232955), (5, 4186364), (7, 2990260), (10, 2093182), (13, 1610140), (14, 1495130), (20, 1046591), (26, 805070), (28, 747565), (31, 675220), (35, 598052), (49, 427180), (52, 402535), (53, 394940), (62, 337610), (65, 322028), (70, 299026), (91, 230020), (98, 213590), (106, 197470), (124, 168805), (130, 161014), (140, 149513), (155, 135044), (182, 115010), (196, 106795), (212, 98735), (217, 96460), (245, 85436), (260, 80507), (265, 78988), (310, 67522), (364, 57505), (371, 56420), (403, 51940), (434, 48230), (455, 46004), (490, 42718), (530, 39494), (620, 33761), (637, 32860), (689, 30380), (742, 28210), (806, 25970), (868, 24115), (910, 23002), (980, 21359), (1060, 19747), (1085, 19292), (1274, 16430), (1378, 15190), (1484, 14105), (1519, 13780), (1612, 12985), (1643, 12740), (1820, 11501), (1855, 11284), (2015, 10388), (2170, 9646), (2548, 8215), (2597, 8060), (2756, 7595), (2821, 7420), (3038, 6890), (3185, 6572), (3286, 6370), (3445, 6076), (3710, 5642), (4030, 5194), (4340, 4823)]