156942020

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{197}}^1\times {\mathrm{653}}^1$

素因数の和:920

約数の個数: 48

約数和(自身を含む): 337197168

約数和(自身を除く): 180255148

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 197, 244, 305, 394, 610, 653, 788, 985, 1220, 1306, 1970, 2612, 3265, 3940, 6530, 12017, 13060, 24034, 39833, 48068, 60085, 79666, 120170, 128641, 159332, 199165, 240340, 257282, 398330, 514564, 643205, 796660, 1286410, 2572820, 7847101, 15694202, 31388404, 39235505, 78471010, 156942020]

約数ペア:

[(1, 156942020), (2, 78471010), (4, 39235505), (5, 31388404), (10, 15694202), (20, 7847101), (61, 2572820), (122, 1286410), (197, 796660), (244, 643205), (305, 514564), (394, 398330), (610, 257282), (653, 240340), (788, 199165), (985, 159332), (1220, 128641), (1306, 120170), (1970, 79666), (2612, 60085), (3265, 48068), (3940, 39833), (6530, 24034), (12017, 13060)]