18881172

素因数分解:

$2^2\times 3^2\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 49533120

約数和(自身を除く): 30651948

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 71, 83, 89, 142, 166, 178, 213, 249, 267, 284, 332, 356, 426, 498, 534, 639, 747, 801, 852, 996, 1068, 1278, 1494, 1602, 2556, 2988, 3204, 5893, 6319, 7387, 11786, 12638, 14774, 17679, 18957, 22161, 23572, 25276, 29548, 35358, 37914, 44322, 53037, 56871, 66483, 70716, 75828, 88644, 106074, 113742, 132966, 212148, 227484, 265932, 524477, 1048954, 1573431, 2097908, 3146862, 4720293, 6293724, 9440586, 18881172]

約数ペア:

[(1, 18881172), (2, 9440586), (3, 6293724), (4, 4720293), (6, 3146862), (9, 2097908), (12, 1573431), (18, 1048954), (36, 524477), (71, 265932), (83, 227484), (89, 212148), (142, 132966), (166, 113742), (178, 106074), (213, 88644), (249, 75828), (267, 70716), (284, 66483), (332, 56871), (356, 53037), (426, 44322), (498, 37914), (534, 35358), (639, 29548), (747, 25276), (801, 23572), (852, 22161), (996, 18957), (1068, 17679), (1278, 14774), (1494, 12638), (1602, 11786), (2556, 7387), (2988, 6319), (3204, 5893)]