20749690

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{229}}^1$

素因数の和:307

約数の個数: 64

約数和(自身を含む): 43817760

約数和(自身を除く): 23068070

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 41, 65, 82, 85, 130, 170, 205, 221, 229, 410, 442, 458, 533, 697, 1066, 1105, 1145, 1394, 2210, 2290, 2665, 2977, 3485, 3893, 5330, 5954, 6970, 7786, 9061, 9389, 14885, 18122, 18778, 19465, 29770, 38930, 45305, 46945, 50609, 90610, 93890, 101218, 122057, 159613, 244114, 253045, 319226, 506090, 610285, 798065, 1220570, 1596130, 2074969, 4149938, 10374845, 20749690]

約数ペア:

[(1, 20749690), (2, 10374845), (5, 4149938), (10, 2074969), (13, 1596130), (17, 1220570), (26, 798065), (34, 610285), (41, 506090), (65, 319226), (82, 253045), (85, 244114), (130, 159613), (170, 122057), (205, 101218), (221, 93890), (229, 90610), (410, 50609), (442, 46945), (458, 45305), (533, 38930), (697, 29770), (1066, 19465), (1105, 18778), (1145, 18122), (1394, 14885), (2210, 9389), (2290, 9061), (2665, 7786), (2977, 6970), (3485, 5954), (3893, 5330)]