19947460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4513}}^1$

素因数の和:4552

約数の個数: 48

約数和(自身を含む): 47776176

約数和(自身を除く): 27828716

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4513, 9026, 18052, 22565, 45130, 58669, 76721, 90260, 117338, 153442, 234676, 293345, 306884, 383605, 586690, 767210, 997373, 1173380, 1534420, 1994746, 3989492, 4986865, 9973730, 19947460]

約数ペア:

[(1, 19947460), (2, 9973730), (4, 4986865), (5, 3989492), (10, 1994746), (13, 1534420), (17, 1173380), (20, 997373), (26, 767210), (34, 586690), (52, 383605), (65, 306884), (68, 293345), (85, 234676), (130, 153442), (170, 117338), (221, 90260), (260, 76721), (340, 58669), (442, 45130), (884, 22565), (1105, 18052), (2210, 9026), (4420, 4513)]