640116975980

素因数分解:

$2^2\times 5^1\times {\mathrm{191}}^1\times {\mathrm{12889}}^1\times {\mathrm{13001}}^1$

素因数の和:26090

約数の個数: 48

約数和(自身を含む): 1351492369920

約数和(自身を除く): 711375393940

約数列:

[1, 2, 4, 5, 10, 20, 191, 382, 764, 955, 1910, 3820, 12889, 13001, 25778, 26002, 51556, 52004, 64445, 65005, 128890, 130010, 257780, 260020, 2461799, 2483191, 4923598, 4966382, 9847196, 9932764, 12308995, 12415955, 24617990, 24831910, 49235980, 49663820, 167569889, 335139778, 670279556, 837849445, 1675698890, 3351397780, 32005848799, 64011697598, 128023395196, 160029243995, 320058487990, 640116975980]

約数ペア:

[(1, 640116975980), (2, 320058487990), (4, 160029243995), (5, 128023395196), (10, 64011697598), (20, 32005848799), (191, 3351397780), (382, 1675698890), (764, 837849445), (955, 670279556), (1910, 335139778), (3820, 167569889), (12889, 49663820), (13001, 49235980), (25778, 24831910), (26002, 24617990), (51556, 12415955), (52004, 12308995), (64445, 9932764), (65005, 9847196), (128890, 4966382), (130010, 4923598), (257780, 2483191), (260020, 2461799)]