289464520

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{118633}}^1$

素因数の和:118705

約数の個数: 32

約数和(自身を含む): 661977720

約数和(自身を除く): 372513200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 118633, 237266, 474532, 593165, 949064, 1186330, 2372660, 4745320, 7236613, 14473226, 28946452, 36183065, 57892904, 72366130, 144732260, 289464520]

約数ペア:

[(1, 289464520), (2, 144732260), (4, 72366130), (5, 57892904), (8, 36183065), (10, 28946452), (20, 14473226), (40, 7236613), (61, 4745320), (122, 2372660), (244, 1186330), (305, 949064), (488, 593165), (610, 474532), (1220, 237266), (2440, 118633)]