21815990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{349}}^1$

素因数の和:429

約数の個数: 64

約数和(自身を含む): 48384000

約数和(自身を除く): 26568010

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 47, 70, 94, 95, 133, 190, 235, 266, 329, 349, 470, 658, 665, 698, 893, 1330, 1645, 1745, 1786, 2443, 3290, 3490, 4465, 4886, 6251, 6631, 8930, 12215, 12502, 13262, 16403, 24430, 31255, 32806, 33155, 46417, 62510, 66310, 82015, 92834, 114821, 164030, 229642, 232085, 311657, 464170, 574105, 623314, 1148210, 1558285, 2181599, 3116570, 4363198, 10907995, 21815990]

約数ペア:

[(1, 21815990), (2, 10907995), (5, 4363198), (7, 3116570), (10, 2181599), (14, 1558285), (19, 1148210), (35, 623314), (38, 574105), (47, 464170), (70, 311657), (94, 232085), (95, 229642), (133, 164030), (190, 114821), (235, 92834), (266, 82015), (329, 66310), (349, 62510), (470, 46417), (658, 33155), (665, 32806), (698, 31255), (893, 24430), (1330, 16403), (1645, 13262), (1745, 12502), (1786, 12215), (2443, 8930), (3290, 6631), (3490, 6251), (4465, 4886)]