19902377456

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{383}}^1\times {\mathrm{8059}}^1$

素因数の和:8494

約数の個数: 80

約数和(自身を含む): 42983915520

約数和(自身を除く): 23081538064

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 383, 403, 496, 766, 806, 1532, 1612, 3064, 3224, 4979, 6128, 6448, 8059, 9958, 11873, 16118, 19916, 23746, 32236, 39832, 47492, 64472, 79664, 94984, 104767, 128944, 154349, 189968, 209534, 249829, 308698, 419068, 499658, 617396, 838136, 999316, 1234792, 1676272, 1998632, 2469584, 3086597, 3247777, 3997264, 6173194, 6495554, 12346388, 12991108, 24692776, 25982216, 40125761, 49385552, 51964432, 80251522, 95684507, 160503044, 191369014, 321006088, 382738028, 642012176, 765476056, 1243898591, 1530952112, 2487797182, 4975594364, 9951188728, 19902377456]

約数ペア:

[(1, 19902377456), (2, 9951188728), (4, 4975594364), (8, 2487797182), (13, 1530952112), (16, 1243898591), (26, 765476056), (31, 642012176), (52, 382738028), (62, 321006088), (104, 191369014), (124, 160503044), (208, 95684507), (248, 80251522), (383, 51964432), (403, 49385552), (496, 40125761), (766, 25982216), (806, 24692776), (1532, 12991108), (1612, 12346388), (3064, 6495554), (3224, 6173194), (4979, 3997264), (6128, 3247777), (6448, 3086597), (8059, 2469584), (9958, 1998632), (11873, 1676272), (16118, 1234792), (19916, 999316), (23746, 838136), (32236, 617396), (39832, 499658), (47492, 419068), (64472, 308698), (79664, 249829), (94984, 209534), (104767, 189968), (128944, 154349)]