19561983

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{401}}^1$

素因数の和:535

約数の個数: 32

約数和(自身を含む): 31491072

約数和(自身を除く): 11929089

約数列:

[1, 3, 7, 21, 23, 69, 101, 161, 303, 401, 483, 707, 1203, 2121, 2323, 2807, 6969, 8421, 9223, 16261, 27669, 40501, 48783, 64561, 121503, 193683, 283507, 850521, 931523, 2794569, 6520661, 19561983]

約数ペア:

[(1, 19561983), (3, 6520661), (7, 2794569), (21, 931523), (23, 850521), (69, 283507), (101, 193683), (161, 121503), (303, 64561), (401, 48783), (483, 40501), (707, 27669), (1203, 16261), (2121, 9223), (2323, 8421), (2807, 6969)]