16419980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{313}}^1$

素因数の和:426

約数の個数: 48

約数和(自身を含む): 35976864

約数和(自身を除く): 19556884

約数列:

[1, 2, 4, 5, 10, 20, 43, 61, 86, 122, 172, 215, 244, 305, 313, 430, 610, 626, 860, 1220, 1252, 1565, 2623, 3130, 5246, 6260, 10492, 13115, 13459, 19093, 26230, 26918, 38186, 52460, 53836, 67295, 76372, 95465, 134590, 190930, 269180, 381860, 820999, 1641998, 3283996, 4104995, 8209990, 16419980]

約数ペア:

[(1, 16419980), (2, 8209990), (4, 4104995), (5, 3283996), (10, 1641998), (20, 820999), (43, 381860), (61, 269180), (86, 190930), (122, 134590), (172, 95465), (215, 76372), (244, 67295), (305, 53836), (313, 52460), (430, 38186), (610, 26918), (626, 26230), (860, 19093), (1220, 13459), (1252, 13115), (1565, 10492), (2623, 6260), (3130, 5246)]