278987240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43321}}^1$

素因数の和:43362

約数の個数: 64

約数和(自身を含む): 748604160

約数和(自身を除く): 469616920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 6440, 43321, 86642, 173284, 216605, 303247, 346568, 433210, 606494, 866420, 996383, 1212988, 1516235, 1732840, 1992766, 2425976, 3032470, 3985532, 4981915, 6064940, 6974681, 7971064, 9963830, 12129880, 13949362, 19927660, 27898724, 34873405, 39855320, 55797448, 69746810, 139493620, 278987240]

約数ペア:

[(1, 278987240), (2, 139493620), (4, 69746810), (5, 55797448), (7, 39855320), (8, 34873405), (10, 27898724), (14, 19927660), (20, 13949362), (23, 12129880), (28, 9963830), (35, 7971064), (40, 6974681), (46, 6064940), (56, 4981915), (70, 3985532), (92, 3032470), (115, 2425976), (140, 1992766), (161, 1732840), (184, 1516235), (230, 1212988), (280, 996383), (322, 866420), (460, 606494), (644, 433210), (805, 346568), (920, 303247), (1288, 216605), (1610, 173284), (3220, 86642), (6440, 43321)]