21863925

素因数分解:

$3^5\times 5^2\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 41976480

約数和(自身を除く): 20112555

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 59, 61, 75, 81, 135, 177, 183, 225, 243, 295, 305, 405, 531, 549, 675, 885, 915, 1215, 1475, 1525, 1593, 1647, 2025, 2655, 2745, 3599, 4425, 4575, 4779, 4941, 6075, 7965, 8235, 10797, 13275, 13725, 14337, 14823, 17995, 23895, 24705, 32391, 39825, 41175, 53985, 71685, 74115, 89975, 97173, 119475, 123525, 161955, 269925, 291519, 358425, 370575, 485865, 809775, 874557, 1457595, 2429325, 4372785, 7287975, 21863925]

約数ペア:

[(1, 21863925), (3, 7287975), (5, 4372785), (9, 2429325), (15, 1457595), (25, 874557), (27, 809775), (45, 485865), (59, 370575), (61, 358425), (75, 291519), (81, 269925), (135, 161955), (177, 123525), (183, 119475), (225, 97173), (243, 89975), (295, 74115), (305, 71685), (405, 53985), (531, 41175), (549, 39825), (675, 32391), (885, 24705), (915, 23895), (1215, 17995), (1475, 14823), (1525, 14337), (1593, 13725), (1647, 13275), (2025, 10797), (2655, 8235), (2745, 7965), (3599, 6075), (4425, 4941), (4575, 4779)]