21205531880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^3\times {\mathrm{227}}^1\times {\mathrm{1063}}^1$

素因数の和:1340

約数の個数: 128

約数和(自身を含む): 51963206400

約数和(自身を除く): 30757674520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 227, 260, 338, 454, 520, 676, 845, 908, 1063, 1135, 1352, 1690, 1816, 2126, 2197, 2270, 2951, 3380, 4252, 4394, 4540, 5315, 5902, 6760, 8504, 8788, 9080, 10630, 10985, 11804, 13819, 14755, 17576, 21260, 21970, 23608, 27638, 29510, 38363, 42520, 43940, 55276, 59020, 69095, 76726, 87880, 110552, 118040, 138190, 153452, 179647, 191815, 241301, 276380, 306904, 359294, 383630, 482602, 498719, 552760, 718588, 767260, 898235, 965204, 997438, 1206505, 1437176, 1534520, 1796470, 1930408, 1994876, 2335411, 2413010, 2493595, 3136913, 3592940, 3989752, 4670822, 4826020, 4987190, 6273826, 7185880, 9341644, 9652040, 9974380, 11677055, 12547652, 15684565, 18683288, 19948760, 23354110, 25095304, 31369130, 40779869, 46708220, 62738260, 81559738, 93416440, 125476520, 163119476, 203899345, 326238952, 407798690, 530138297, 815597380, 1060276594, 1631194760, 2120553188, 2650691485, 4241106376, 5301382970, 10602765940, 21205531880]

約数ペア:

[(1, 21205531880), (2, 10602765940), (4, 5301382970), (5, 4241106376), (8, 2650691485), (10, 2120553188), (13, 1631194760), (20, 1060276594), (26, 815597380), (40, 530138297), (52, 407798690), (65, 326238952), (104, 203899345), (130, 163119476), (169, 125476520), (227, 93416440), (260, 81559738), (338, 62738260), (454, 46708220), (520, 40779869), (676, 31369130), (845, 25095304), (908, 23354110), (1063, 19948760), (1135, 18683288), (1352, 15684565), (1690, 12547652), (1816, 11677055), (2126, 9974380), (2197, 9652040), (2270, 9341644), (2951, 7185880), (3380, 6273826), (4252, 4987190), (4394, 4826020), (4540, 4670822), (5315, 3989752), (5902, 3592940), (6760, 3136913), (8504, 2493595), (8788, 2413010), (9080, 2335411), (10630, 1994876), (10985, 1930408), (11804, 1796470), (13819, 1534520), (14755, 1437176), (17576, 1206505), (21260, 997438), (21970, 965204), (23608, 898235), (27638, 767260), (29510, 718588), (38363, 552760), (42520, 498719), (43940, 482602), (55276, 383630), (59020, 359294), (69095, 306904), (76726, 276380), (87880, 241301), (110552, 191815), (118040, 179647), (138190, 153452)]