81648225

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{269}}^1$

素因数の和:375

約数の個数: 72

約数和(自身を含む): 156686400

約数和(自身を除く): 75038175

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 71, 75, 95, 171, 213, 225, 269, 285, 355, 475, 639, 807, 855, 1065, 1345, 1349, 1425, 1775, 2421, 3195, 4035, 4047, 4275, 5111, 5325, 6725, 6745, 12105, 12141, 15333, 15975, 19099, 20175, 20235, 25555, 33725, 45999, 57297, 60525, 60705, 76665, 95495, 101175, 127775, 171891, 229995, 286485, 303525, 362881, 383325, 477475, 859455, 1088643, 1149975, 1432425, 1814405, 3265929, 4297275, 5443215, 9072025, 16329645, 27216075, 81648225]

約数ペア:

[(1, 81648225), (3, 27216075), (5, 16329645), (9, 9072025), (15, 5443215), (19, 4297275), (25, 3265929), (45, 1814405), (57, 1432425), (71, 1149975), (75, 1088643), (95, 859455), (171, 477475), (213, 383325), (225, 362881), (269, 303525), (285, 286485), (355, 229995), (475, 171891), (639, 127775), (807, 101175), (855, 95495), (1065, 76665), (1345, 60705), (1349, 60525), (1425, 57297), (1775, 45999), (2421, 33725), (3195, 25555), (4035, 20235), (4047, 20175), (4275, 19099), (5111, 15975), (5325, 15333), (6725, 12141), (6745, 12105)]