20991930

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{11471}}^1$

素因数の和:11542

約数の個数: 32

約数和(自身を含む): 51211008

約数和(自身を除く): 30219078

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 61, 122, 183, 305, 366, 610, 915, 1830, 11471, 22942, 34413, 57355, 68826, 114710, 172065, 344130, 699731, 1399462, 2099193, 3498655, 4198386, 6997310, 10495965, 20991930]

約数ペア:

[(1, 20991930), (2, 10495965), (3, 6997310), (5, 4198386), (6, 3498655), (10, 2099193), (15, 1399462), (30, 699731), (61, 344130), (122, 172065), (183, 114710), (305, 68826), (366, 57355), (610, 34413), (915, 22942), (1830, 11471)]