221427255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{181}}^1\times {\mathrm{191}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 415973376

約数和(自身を除く): 194546121

約数列:

[1, 3, 5, 7, 15, 21, 35, 61, 105, 181, 183, 191, 305, 427, 543, 573, 905, 915, 955, 1267, 1281, 1337, 2135, 2715, 2865, 3801, 4011, 6335, 6405, 6685, 11041, 11651, 19005, 20055, 33123, 34571, 34953, 55205, 58255, 77287, 81557, 103713, 165615, 172855, 174765, 231861, 241997, 244671, 386435, 407785, 518565, 725991, 1159305, 1209985, 1223355, 2108831, 3629955, 6326493, 10544155, 14761817, 31632465, 44285451, 73809085, 221427255]

約数ペア:

[(1, 221427255), (3, 73809085), (5, 44285451), (7, 31632465), (15, 14761817), (21, 10544155), (35, 6326493), (61, 3629955), (105, 2108831), (181, 1223355), (183, 1209985), (191, 1159305), (305, 725991), (427, 518565), (543, 407785), (573, 386435), (905, 244671), (915, 241997), (955, 231861), (1267, 174765), (1281, 172855), (1337, 165615), (2135, 103713), (2715, 81557), (2865, 77287), (3801, 58255), (4011, 55205), (6335, 34953), (6405, 34571), (6685, 33123), (11041, 20055), (11651, 19005)]