20005200280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{401}}^1\times {\mathrm{487}}^1$

素因数の和:1109

約数の個数: 128

約数和(自身を含む): 48941988480

約数和(自身を除く): 28936788200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 197, 260, 394, 401, 487, 520, 788, 802, 974, 985, 1576, 1604, 1948, 1970, 2005, 2435, 2561, 3208, 3896, 3940, 4010, 4870, 5122, 5213, 6331, 7880, 8020, 9740, 10244, 10426, 12662, 12805, 16040, 19480, 20488, 20852, 25324, 25610, 26065, 31655, 41704, 50648, 51220, 52130, 63310, 78997, 95939, 102440, 104260, 126620, 157994, 191878, 195287, 208520, 253240, 315988, 383756, 390574, 394985, 479695, 631976, 767512, 781148, 789970, 959390, 976435, 1026961, 1247207, 1562296, 1579940, 1918780, 1952870, 2053922, 2494414, 2538731, 3159880, 3837560, 3905740, 4107844, 4988828, 5077462, 5134805, 6236035, 7811480, 8215688, 9977656, 10154924, 10269610, 12472070, 12693655, 20309848, 20539220, 24944140, 25387310, 38471539, 41078440, 49888280, 50774620, 76943078, 101549240, 153886156, 192357695, 307772312, 384715390, 500130007, 769430780, 1000260014, 1538861560, 2000520028, 2500650035, 4001040056, 5001300070, 10002600140, 20005200280]

約数ペア:

[(1, 20005200280), (2, 10002600140), (4, 5001300070), (5, 4001040056), (8, 2500650035), (10, 2000520028), (13, 1538861560), (20, 1000260014), (26, 769430780), (40, 500130007), (52, 384715390), (65, 307772312), (104, 192357695), (130, 153886156), (197, 101549240), (260, 76943078), (394, 50774620), (401, 49888280), (487, 41078440), (520, 38471539), (788, 25387310), (802, 24944140), (974, 20539220), (985, 20309848), (1576, 12693655), (1604, 12472070), (1948, 10269610), (1970, 10154924), (2005, 9977656), (2435, 8215688), (2561, 7811480), (3208, 6236035), (3896, 5134805), (3940, 5077462), (4010, 4988828), (4870, 4107844), (5122, 3905740), (5213, 3837560), (6331, 3159880), (7880, 2538731), (8020, 2494414), (9740, 2053922), (10244, 1952870), (10426, 1918780), (12662, 1579940), (12805, 1562296), (16040, 1247207), (19480, 1026961), (20488, 976435), (20852, 959390), (25324, 789970), (25610, 781148), (26065, 767512), (31655, 631976), (41704, 479695), (50648, 394985), (51220, 390574), (52130, 383756), (63310, 315988), (78997, 253240), (95939, 208520), (102440, 195287), (104260, 191878), (126620, 157994)]