21455408

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:190

約数の個数: 80

約数和(自身を含む): 48434400

約数和(自身を除く): 26978992

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 61, 76, 89, 104, 122, 152, 178, 208, 244, 247, 304, 356, 488, 494, 712, 793, 976, 988, 1157, 1159, 1424, 1586, 1691, 1976, 2314, 2318, 3172, 3382, 3952, 4628, 4636, 5429, 6344, 6764, 9256, 9272, 10858, 12688, 13528, 15067, 18512, 18544, 21716, 21983, 27056, 30134, 43432, 43966, 60268, 70577, 86864, 87932, 103151, 120536, 141154, 175864, 206302, 241072, 282308, 351728, 412604, 564616, 825208, 1129232, 1340963, 1650416, 2681926, 5363852, 10727704, 21455408]

約数ペア:

[(1, 21455408), (2, 10727704), (4, 5363852), (8, 2681926), (13, 1650416), (16, 1340963), (19, 1129232), (26, 825208), (38, 564616), (52, 412604), (61, 351728), (76, 282308), (89, 241072), (104, 206302), (122, 175864), (152, 141154), (178, 120536), (208, 103151), (244, 87932), (247, 86864), (304, 70577), (356, 60268), (488, 43966), (494, 43432), (712, 30134), (793, 27056), (976, 21983), (988, 21716), (1157, 18544), (1159, 18512), (1424, 15067), (1586, 13528), (1691, 12688), (1976, 10858), (2314, 9272), (2318, 9256), (3172, 6764), (3382, 6344), (3952, 5429), (4628, 4636)]