81278960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7639}}^1$

素因数の和:7678

約数の個数: 80

約数和(自身を含む): 227366400

約数和(自身を除く): 146087440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 35, 38, 40, 56, 70, 76, 80, 95, 112, 133, 140, 152, 190, 266, 280, 304, 380, 532, 560, 665, 760, 1064, 1330, 1520, 2128, 2660, 5320, 7639, 10640, 15278, 30556, 38195, 53473, 61112, 76390, 106946, 122224, 145141, 152780, 213892, 267365, 290282, 305560, 427784, 534730, 580564, 611120, 725705, 855568, 1015987, 1069460, 1161128, 1451410, 2031974, 2138920, 2322256, 2902820, 4063948, 4277840, 5079935, 5805640, 8127896, 10159870, 11611280, 16255792, 20319740, 40639480, 81278960]

約数ペア:

[(1, 81278960), (2, 40639480), (4, 20319740), (5, 16255792), (7, 11611280), (8, 10159870), (10, 8127896), (14, 5805640), (16, 5079935), (19, 4277840), (20, 4063948), (28, 2902820), (35, 2322256), (38, 2138920), (40, 2031974), (56, 1451410), (70, 1161128), (76, 1069460), (80, 1015987), (95, 855568), (112, 725705), (133, 611120), (140, 580564), (152, 534730), (190, 427784), (266, 305560), (280, 290282), (304, 267365), (380, 213892), (532, 152780), (560, 145141), (665, 122224), (760, 106946), (1064, 76390), (1330, 61112), (1520, 53473), (2128, 38195), (2660, 30556), (5320, 15278), (7639, 10640)]